Q: Is one day isolation sufficient to stop forward transmission of COVID-19?
A: People with COVID-19 could potentially transmit it to others well beyond a day after developing symptoms or testing positive. New guidance from the CDC advises people to isolate until they have been fever-free and with symptoms improving for at least 24 hours, and then take precautions for five days, which covers the period when “most people are still infectious.”
The COVID-19 pandemic was caused by a novel coronavirus, first isolated in January 2020. But a viral video has been spreading a conspiracy theory that the pandemic has actually been a plot to poison people with snake venom.
As many Americans and others around the globe prepare for holiday travel and get-togethers, the omicron variant continues to be a concern. While the available data on transmission, vaccine effectiveness and severity of disease are still preliminary, here’s what we’ve learned so far.
An increase in pandemic restrictions in Germany sparked a protest at a market, where a man dressed as Santa Claus was briefly detained. Online posts falsely claimed he was arrested for not wearing a mask. But police said he was detained for participating in an unregistered protest.
It’s not known yet whether the omicron variant causes more or less severe COVID-19 than the delta variant, although some preliminary indications suggest omicron infections might be milder. A Facebook post nevertheless claims, without evidence, that the “toxicity” of omicron is 5 times higher than delta and that its mortality rate is higher.
Infectious disease experts say low vaccination rates, resistance to protective measures such as wearing a mask and the highly transmissible delta variant are driving the current surge of COVID-19 cases in the U.S.
NBA star Bradley Beal made some misleading comments — shared in viral video clips — about the effectiveness of COVID-19 vaccines. No vaccine is 100% effective, but clinical trials and studies show the COVID-19 vaccines are very effective at preventing illness, particularly serious illness, including for those previously infected, such as Beal.
Q: How do people who have not been vaccinated against COVID-19 pose a risk to people who have been vaccinated?
A: An unvaccinated person who is infected with COVID-19 poses a much greater risk to others who are also unvaccinated. But vaccines are not 100% effective, so there is a chance that an unvaccinated person could infect a vaccinated person — particularly the vulnerable, such as elderly and immunocompromised individuals.
All of the authorized COVID-19 vaccines are effective at preventing symptomatic disease. Yet Fox News host Tucker Carlson baselessly casts doubt on the effectiveness of the vaccines, because federal officials urge fully vaccinated people to wear masks in public settings.
SARS-CoV-2, the virus that causes COVID-19, is spread from person to person through respiratory droplets or particles when infected people cough, sneeze, talk or breathe.
Most often, transmission occurs when such droplets or particles are breathed in or land in or on a person’s eyes, nose or mouth. As a result, risk is thought to be highest when people are in close contact with one another, typically within 6 feet or so of an infected person,