He said that Covid-19 “has not thrown its last surprise at us and there will be several more [variants] over the next period,” according to Sky News. He added that it would likely take five years before there are vaccines that could “hold the line” to a very large degree against a range of coronavirus variants.
The risk of being exposed to Covid-19 indoors is as great at 60 feet as it is at 6 feet — even when wearing a mask, according to a new study by Massachusetts Institute of Technology researchers who challenge social distancing guidelines adopted across the world.
MIT professors Martin Z. Bazant, who teaches chemical engineering and applied mathematics, and John W.M. Bush, who teaches applied mathematics, developed a method of calculating exposure risk to Covid-19 in an indoor setting that factors in a variety of issues that could affect transmission, including the amount of time spent inside, air filtration and circulation, immunization, variant strains, mask use, and even respiratory activity such as breathing, eating, speaking or singing.
The Centers for Disease Control and Prevention is no longer recommending testing for everyone who’s been exposed to Covid-19, saying people who don’t have symptoms “do not necessarily need a test.”
The CDC has quietly revised its guidance on coronavirus testing to say that people without symptoms who were exposed to an infected person might not need to be screened.
The agency previously recommended testing for anyone with a “recent known or suspected exposure” to the virus even if they did not have symptoms.
The CDC’s previous guidance cited “the potential for asymptomatic and pre-symptomatic transmission” as a reason why people without symptoms who were exposed to the virus be “quickly identified and tested.”
Coronavirus patients without symptoms aren’t driving the spread of the virus, World Health Organization officials said Monday, casting doubt on concerns by some researchers that the disease could be difficult to contain due to asymptomatic infections.
66% of new admissions were from people who had largely been sheltering at home. The next highest source of admissions was from nursing homes, 18%.