BA.5 is just one of the latest subvariants to come from the original Omicron lineage, Michael Blaivas, MD, chief medical officer at Anavasi Diagnostics, told Health. That being said, not all outdoor spaces are created equal. Ventilation is very important. "The risk of transmission is much lower . But that doesn't mean that being outdoors isn't going to. You could decide to go to an outdoor lunch with your colleagues, but skip the happy hour in a packed bar. More information is available, Travel requirements to enter the United States are changing, starting November 8, 2021. Someone coughing and sneezing will exhale droplets that can transmit the virus. "From a virus standpoint, there's no indication that omicron is behaving differently [in outdoor settings]," says Dr. Preeti Malani, an infectious disease professor at the University of Michigan who co-authored an editorial on the research on football teams. For this investigation, a confirmed case in a household contact was defined as a positive SARS-CoV-2 nucleic acid amplification test result or antigen test result (through local or home testing)** 14 days after the index date. Upping the ante is the fact that recent subvariants like BA.4 and BA.5 are the most immune-evasive yet, with the ability to dodge antibodies from both vaccines and prior infection. The more crowded an outdoors space is, the more it begins to mimic an indoor space in terms of our exposure to shared air.. Although outdoor settings are overall the safer option, when a virus is more contagious, it's more contagious in any setting. But BA.5s heightened transmissibility will ultimately lead to more indoor and outdoor spread. That, combined with the sheer volume of cases, could mean that there could be more cases of outdoor transmission, says Dr. Jill Weatherhead, assistant professor of adult and pediatric infectious diseases at Baylor College of Medicine. Lynn E. Sosa reports being a past Council of State and Territorial Epidemiologists STD Subcommittee chair. Heres what experts know and dont know about COVID spread outdoors: At this point, we are very familiar with uncertainty when it comes to COVID. Household contact ARs ranged from a low of 47.5% (19 of 40) when the index patient was aged 511 years to a high of 72.0% (18 of 25) when the index patient was aged 04 years. Health and Human Services. Why it may be harder to catch COVID-19 from surfaces than we first thought, Acknowledge COVID-19 is airborne, Lancet report urges as more evidence mounts, Omicron subvariant BA.2 raises new questions about puzzling evolution of virus behind COVID-19, Why an Omicron infection alone might not offer the immune boost you'd expect. Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. After three years, most people know how to do that: vaccines, masks, physical distancing, handwashing and lets not forget ventilation. I do not think that people need to mask outdoors, but there may be situations where someone is extremely vulnerable for example, a cancer patient on chemotherapy and wants to be extra careful. Ive talked before about how the new guidelines from the US Centers for Disease Control and Prevention can be used here. Masking in those environments, distancing, and vaccination are still effective preventative tools for us to utilize, Dr. Rohde says. they should expect rapid transmission of COVID-19 that will prevent students . Most. So, does this mean youre at risk every time you step outside? How Well Do Rapid COVID Tests Detect Omicron and Its Subvariants? Regular testing after potential exposure and remaining up to date on vaccines and boosters are also necessary steps, regardless of whether you're indoors or outdoors. Sunlight and humidity, for instance, can both contribute to how long viruses are able to survive on surfaces outdoors, he noted. "You're never going to find that much virus in a small area that you touch," he said. SARS-CoV-2 B.1.1.529 (Omicron) variantUnited States, December 1-8, 2021. And people who are vaccinated likely carry less infectious virus particles than people who are not. Omicron transmission occurred in 124 (67.8%) of 183 households. Despite Omicron's rapid spread, the good news is that COVID-19 strategies like vaccination, masking, and social distancing could slow its transmission. Fr nhere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklrung und Cookie-Richtlinie. A SARS-CoV-2 Omicron subvariant, BA.2, became the dominant strain of COVID-19 in the United States. Rodney E. Rohde, PhD, a virologist and professor of clinical laboratory science at Texas State University, tells SELF that many people have seen the outdoors as a get out of jail free cardbut that has never really been the case. Age at index date was determined from date of birth or self-reported age. CNN: Can you give us a quick refresher what protective measures are effective against this very contagious BA.2 variant? And while it is known that BA.4 and BA.5 are more transmissible than other variants, it is not yet clear if they are spreading outdoors any more than other variants. SARS-CoV-2 B.1.1.529 (Omicron) Variant Transmission Within Households Four U.S. Jurisdictions, November 2021February 2022. 1. So if you find yourself worrying about not being able to distance yourself in a crowded outdoor situation with people of unknown vaccination status, slip a mask on. The likelihood of catching Covid-19 outdoors is low but increases in crowded areas or at events where people are close together for long periods of time . Updated Index patients were defined as the first person within each household to recently experience COVID-19compatible symptoms or have a positive SARS-CoV-2 test result. provided as a service to MMWR readers and do not constitute or imply URL addresses listed in MMWR were current as of If your own risk tolerance is low, certain outdoor situations could call for masking up. Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data. When an . BA.5 caught the attention of public health experts after it quickly displaced the very transmissible BA.1 and BA.2 omicron subvariants. Yes, you can catch BA.5 outside, but its more likely that youll catch it indoors than outdoors. For example, talking face-to-face with someone who is unmasked and very, very close to you is risky no matter where you are, especially if it's for a prolonged period of time. Please check the Centers for Disease Control and Prevention for the most updated recommendations. When do infected people transmit the virus? A confirmed case in a household contact was receipt of a positive SARS-CoV-2 nucleic acid amplification test result or antigen test result (through local or home testing) reported 14 days after the index date. Patel said that it all depends on the context, the space and the type of activity. There isnt a tried-and-true rule. Even so, he said the findings suggest it's worth being cautious. According to Drs. P-values comparing differences in stratum-specific ARs were calculated using a generalized estimating equation approach to account for clustering by household (2). ARs among household contacts were estimated overall, by household contact characteristics, and by index patient characteristics, by dividing the number of household contacts with confirmed and probable cases by the total number of household contacts within a given stratum. The COVID-19 subvariant of Omicron, BA.5, is spreading quickly in the U.S. . The subvariant made up 74% of new infections as of April 16, 2022. She has written about COVID-19 for many publications, including The New York Times, Kaiser Health News, Medscape and The Washington Post. The other/multiple race category included American Indian or Alaska Native, Native Hawaiian or other Pacific Islander, another race specified by the person not in the provided list, or multiple races. 95% CIs for attack rates are represented by error bars. We know that this is not in any shape, manner, or form a major transmission route for this virus. How can I reduce my risk of getting COVID-19? Dr. Mallika Marshall explains: Omicron subvariants BA.4 and BA.5 are highly transmissible, some say as transmissible as measles, which is considered the most infectious viral illness in humans. How should people weigh which precautions they want to follow? "Doing experiments inside a lab where humidity is controlled is one thing. Being outside would be lower exposure risk than being indoors, even with good ventilation and filtration; both of those options would be lower risk than being indoors with poor ventilation or filtration. Ad Choices. This is the most common transmission. The following conversation has been lightly edited for length and clarity. US Travel Association. Should indoor mask mandates come back? Sheila Mulrooney Eldred is a freelance health journalist in Minneapolis. "It is more transmissible than other previous variants because it can evade previous immunity from COVID infection and vaccination.". So called stealth Omicron, nicknamed for its ability to evade detection on PCR tests, was about 1.4 times more transmissible than BA.1, so its reproductive rate was around 13.3, Adrian Esterman, a professor of biostatistics and epidemiology at the University of South Australia, recently wrote on academic news website The Conversation. Id prefer that these events require proof of vaccination and same-day negative test result. In a study of household transmission in four U.S. jurisdictions, Omicron infection resulted in high transmission among household contacts, particularly among those who lived with index patients who were not vaccinated or who did not take measures to reduce the risk of transmission to household contacts. BOSTON -- As Omicron cases are sweeping the nation, some experts are warning that being outdoors may not provide as much protection as before. But if it's a casual interaction outside, even if it's relatively crowded, I'm comfortable not having a mask on. Omicron Infection Timeline: When Symptoms Start and How Long They Last. Multicomponent COVID-19 prevention strategies, including up-to-date vaccination, isolation of infected persons, and mask use at home, are important to reduce Omicron transmission in household settings. Users are referred to the electronic PDF version (https://www.cdc.gov/mmwr) But he warned the public not to panic, and avoid resorting to heavy-handed precautions. You would want to have a higher threshold for caution depending on your familys medical situation. What . the date of publication. ", Lauren Pelley covers health and medical science for CBC News, including the global spread of infectious diseases, Canadian health policy, and pandemic preparedness. Results: Five identified studies found a low proportion of reported global SARS-CoV-2 infections occurred outdoors (<10%) and the odds of indoor transmission was very high compared to outdoors (18.7 times; 95% confidence interval, 6.0-57.9). All variants and subvariants have changes in their genetic code, compared to the original virus they came from. Then came Omicron, with an reproductive rate almost twice as large: 9.5. All rights reserved. On February 25, 2022, this report was posted online as an MMWR Early Release. Experts Are Excited About a New COVID TreatmentHeres What to Know About It. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. Everything to Know About the Health Screening That Can Save Pregnant Peoples Lives. By entering your email and clicking Sign Up, you're agreeing to let us send you customized marketing messages about us and our advertising partners. If you are generally healthy and fully vaccinated and boosted, your chance of severe illness from Covid-19 is very low. The findings from this investigation reinforce the importance of multi-component prevention strategies, including up-to-date vaccination, isolation of infected persons, and mask use at home, to reduce Omicron transmission in household settings. Some will think those activities are worth the risk. See the Interactive Home Ventilation Tool. MMWR Morb Mortal Wkly Rep 2022;71:14652. Once you head inside, especially in packed areas with low air turnover, there tends to be high transmission of the virus, so plan accordingly. Throughout the COVID-19 pandemic, several coronavirus variants have emerged as the virus, SARS-CoV-2, continues to mutate and evolve. Omicron infection resulted in high ARs among household contacts in this investigation, particularly among those who lived with index patients who were not vaccinated or who did not practice prevention measures (isolating or ever wearing a mask at home). Nevertheless, in its coronavirus profile, the RKI also posits that "overall, transmissions outdoors rarely occur. Even if you cant take time off, you can still take care of yourself. Roberts added that since BA.5 is more transmissible than prior variants indoors, it is likely that its more transmissible outdoors, too. 3501 et seq. A majority of index patients were White (59.0%, 108 of 183), and 21.3% (39 of 183) were Hispanic/Latino. The other/multiple races category included American Indian or Alaskan Native, Native Hawaiian or other Pacific Islander, another race specified by the person not in the provided list, or multiple races. Some people washed their mail or wore gloves to the grocery store, while policymakers cordoned off playgrounds and encouraged businesses to scrub every surface. But are new subvariants changing that? Persons with sequence-confirmed Omicron infection and their household contacts were interviewed. You can bring back some things that are lower risk or higher value but still take some precautions. We used to say it would take about 15 minutes of close contact to catch the virus if around from someone who was infected. And should we skip large indoor events again? Accessed February 23, 2022. To investigate the effectiveness of prevention strategies in household settings, CDC partnered with four U.S. jurisdictions to describe Omicron household transmission during November 2021February 2022. So attending a tightly packed outdoor concert and sharing your drink with a friend tends to lend itself to a higher transmission risk than, say, a park picnic in an open space with a couple of friends who arent sitting close to you. It again depends on whats going on in your community, what your medical situation is, and how much you want to keep avoiding Covid-19. The B.1.1.529 (Omicron) variant, first detected in November 2021, was responsible for a surge in U.S. infections with SARS-CoV-2, the virus that causes COVID-19, during December 2021January 2022 (1). Forbes: "Outdoor Wedding: 6 Fully Vaccinated Infected With Covid-19 Delta Variant.". As for indoor activities outside of homemask up, even if your trips are brief, she recommended: Its more possible than ever to catch COVID in passing. All HTML versions of MMWR articles are generated from final proofs through an automated process. Once a saver, always a saver: Warren Buffett says generational wealth isnt what it used to be in his annual letter Its bigger than the housing crisis: An influential economist just blamed NIMBYs for American decline, and Elon Musk CA Notice at Collection and Privacy Notice, Do Not Sell/Share My Personal Information. ** Persons provided retrospective information about any SARS-CoV-2 testing that they chose and were able to perform. Outdoor social gatherings are very safe, and certainly lower risk than the equivalent setting indoors. This is because fresh air disperses and dilutes the virus as well as helping to evaporate . A Warner Bros. Statistical significance was defined as p<0.05. it all depends on the context, the space and the type of activity. There isnt a tried-and-true rule. More at sheilaeldred.pressfolios.com. "The extra virus stability on surfaces may be one possible factor and should be taken into consideration when recommending control measures against the infection.". Centers for Disease Control and Prevention. **** A negative SARS-CoV-2 test result was reported on the day of or after symptom onset by 38.8% (19 of 49) of household contacts classified as having probable COVID-19 and 68.6% (140 of 204) of those classified as not having COVID-19. Peter Kneffel Roberts stressed that COVID spread outdoors is much less common than spread indoors, but nothing is perfect. My husband and I are vaccinated and boosted. A probable case in a household contact was defined as the presence of COVID-19compatible symptoms in a household contact during the same 14-day period, but without confirmation by a SARS-CoV-2 test. Vaccination status was based primarily on self-report; participants were categorized as having received a booster dose, fully vaccinated (<5 or 5 months before the index date), partially vaccinated, or unvaccinated., The interval between the index date and onset of symptoms or positive test result in a household contact was calculated. Here's what you need to know. But that shouldn't cause you to lose sight of the advantages of socializing outdoors, she adds. Department of Health and Human Services. What are the implications for public health practice? They can also be exposed by inhaling aerosol particles that are spreading away from the infected person. And playing outdoors, Malani notes, is great for kids building snow structures and sledding in parts of the country that are now shivering in winter temperatures. Persons reported their race (White, Black, Asian, American Indian or Alaska Native, or Native Hawaiian or other Pacific Islander) and ethnicity (Hispanic/Latino or non-Hispanic/Latino) from lists of options and had the opportunity to state another option if their race or ethnicity was not listed. Some persons who were fully vaccinated had unknown dates for completion of their primary vaccination series. Mutations and natural selection can help subsequent versions of a virus get stronger and stronger in different ways, which seems to be happening with the Covid-19 coronavirus. *** Seven days was chosen for this analysis, because 75% of cases occurred 7 days after the index date. In order to outcompete, successful COVID variants have become more transmissible with time. A new study out of Hong Kong suggests Omicron might be surviving longer on everyday objects than its early predecessor raising questions about which basic precautions to prevent surface-based transmission might still be warranted. The first is arming yourself with information about community levels in the area to which you're traveling; the CDC's community levels tracker can give you county-by-county information on hospital admissions and COVID-19 case counts. There are several ways this can happen: Droplets or aerosols. Experts warn omicron variants can spread more easily outdoors; prior infections provide less immunit. Your Next COVID Vaccination Could Be a Nasal Spray: Here's Why, What You Should Know About BA.2, a SARS-CoV-2 Omicron Variant. In any community where transmission is very intense, I would say its best to be in small groups, Patel said. Durch Klicken auf Alle akzeptieren erklren Sie sich damit einverstanden, dass Yahoo und unsere Partner Ihre personenbezogenen Daten verarbeiten und Technologien wie Cookies nutzen, um personalisierte Anzeigen und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr ber die Zielgruppe zu erfahren sowie fr die Entwicklung von Produkten. And while things are admittedly looking up, infection rates are low and (in many locations . These findings are subject to at least six limitations. "The virus is fragile; these mutations haven't changed that. Audience Relations, CBC P.O. . "Being outdoors in the outside air absolutely protects us from less transmissible viruses," Sharon Nachman, MD, Chief of the Division of Pediatric Infectious Diseases at Stony Brook Children's Hospital, told Health. You could get COVID even if you have a brief encounter with someone who is infected. Building off other recent research which showed Omicron's heavily-mutated spike protein is more stable than the ancestral strain, and their own previous findings on SARS-CoV-2's level of infectiousness on various surfaces, the Hong Kong team explored what would happen if droplets containing Omicron the BA.1 lineage, specifically were applied to surfaces like stainless steel, paper, and glass. Monthly travel data report. Wen: You need to decide whats best for you, with the understanding that one-way masking with an N95 or equivalent works very well that is, even if others around you arent masking, you are still well-protected if you wear a well-fitting, high-quality mask at all times. A probable case in a household contact was the presence of any symptom consistent with COVID-19 during the same 14-day period but without a positive SARS-CoV-2 test confirmation. Biometrics 1988;44:104960. With the COVID-19 omicron variant causing another surge in cases, K-12 schools across the United States are faced with the choice of whether to stay with in-person instruction. When possible, vaccination data were supplemented with or verified using state or jurisdiction registry data. The protective measures we talked about early in the pandemic still work against Omicron. What if you have to go back to the office, and others arent masking? Ahead, experts explain what you need to know about this subvariant, outdoor transmission, and staying safe as you enjoy your summer. All this to say your protection outdoors isnt what it was in 2020and it may be time to begin thinking more critically about outdoor gatherings. Fully vaccinated was defined as completion of the primary vaccination series 2 weeks before the index date and stratified into completion <5 months or 5 months before the index date. Slightly less transmissible were the 1918 pandemic strain of flu, which had an estimated R0 of 2, as does Ebola. It's this increased transmissibility that can make activities that were previously thought of safer (but not completely risk-free) options, more risky. COVID Vaccine Needle Size MattersSo Why Arent We Hearing More About It. Received a booster dose was defined as having received an additional dose after completion of the primary COVID-19 vaccination series before the index date. Outdoor activities are inherently safer than indoor gatherings, Dr. Marr says. For some people, a tented wedding is outdoors. Ensuring you are able to distance even in an outdoor setting can only help reduce the risk of spread, Roberts stated. ** An index patient with a confirmed COVID-19 case was the first person with a positive SARS-CoV-2 nucleic acid amplification test result or antigen test result (through local or home testing) reported in a household. Someone who coughed onto their hand and then touched a door could seed virus there and transmit it to you if you touch. "That doesn't mean [transmission is] impossible if you're packed together in a place that's only sort of open air and if people are sharing food or kissing or drinking. See the Interactive Home Ventilation Tool. The COVID Public Health Emergency Is Ending Soon. If you are high-risk or have close contact with someone who is high risk, wear a mask indoors, even if you're just running inside to use the restroom or grab something quickly from a store. Any information published on this website or by this brand is not intended as a substitute for medical advice, and you should not take any action before consulting with a healthcare professional. Revelers can still hold indoor. These cookies may also be used for advertising purposes by these third parties. Washington, DC: US Travel Association; 2021. Of course, none of us want to get infected by the coronavirus, and no one should be trying to get it. Thats a personal decision that will differ from person to person. According to the Centers for Disease Control and Prevention (CDC), the subvariant is causing approximately 65% of the countrys COVID-19 cases at the time of publication. Trends in disease severity and health care utilization during the early Omicron variant period compared with previous SARS-CoV-2 high transmission periodsUnited States, December 2020January 2022. Vaccination status was not always verified, and the analysis did not account for potential variations in prevention practices (e.g., frequency of mask use). "Slipping on the ice or getting in an accident on the way [to an outdoor rendezvous] is probably more likely than getting COVID outside," Malani says. More information is available, Recommendations for Fully Vaccinated People, https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003987, National Center for Immunization and Respiratory Diseases (NCIRD), International Travel to and from the United States, Requirement for Proof of COVID-19 Vaccination for Air Passengers, Requirement for Proof of Negative COVID-19 Test or Documentation of Recovery from COVID-19 for Air Passengers Traveling to the United States from China, Hong Kong, or Macau, U.S. Department of Health & Human Services. It appears that outdoor transmission has become more likely with the newer variants over the past year (i.e., since delta) as they have become more transmissible, but outdoors remains a much lower-risk setting than indoors, Dr. Marr explains. Study participants who contributed their time and information; Olivia Almendares, Sarah E. Smith-Jeffcoat, Emeka Oraka, CDC; Charles Powell, Avery Gartman, Connecticut Department of Public Health; Ashley Becht, Hallie Hutchison, Eugene Olshansky, Rachel Berg, Adrianna Koczwara, Lisa Addis, Michael Deneufbourg, Sarah Love, Isaac Ghinai, Peter Ruestow, Shamika Smith, Daniel Liguori, Frances Lendacki, Janna Kerins, Stephanie Black, Chicago Department of Public Health; Stefan Green, Hannah Barbian, Sofiya Bobrovska, Regional Innovative Public Health Laboratory, Chicago Department of Public Health and Rush University; Barbara Cuene, Stephen Fendt, Jennifer Lares, Carri Marlow, Nandhu Balakrishnan, Katherine Akinyemi, Addie Skillman, Milwaukee Health Department; Leisha Nolen, Alexis Molina, Shai Miguel, Alix Elliston, April Jorgensen, Austin Newbold, Garnet Kwader, Sam Andersen, Utah Department of Health. A generalized estimating equation approach to account for clustering by household ( 2.... 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