Nearly every day some new scientific evidence is published and one of the principal players in the US, the CDC, US Centers for Disease Control and Prevention, updated guidance on its website on Friday to say that coronavirus can commonly spread "through respiratory droplets or small particles, such as those in aerosols", which are produced even when a person breathes, warning that the principal form of propagation of the virus is through the air.
The "draft" changes included stating COVID-19 transmits through the air and warned about poorly ventilated situations, saying that is "thought to be the main way the virus spreads". At the start of the pandemic, the agencies concluded that the coronavirus spread from person to person when they were in close contact with each other, through heavy, large droplets produced when someone who was sick coughed or sneezed.
Health officials had also recommended that people use air purifiers to cut down on airborne germs while inside to prevent the spread of virus, CBNC reports. Previously, the advice was to maintain "good social distance" of "about 6 feet".
"CDC is now updating its recommendations regarding airborne transmission of SARS-CoV-2 (the virus that causes COVID-19)", the note reads.
"The CDC just published scientifically valid information and then pulled it off their website and this is very likely a scandal", said Sen. "In general, indoor environments without good ventilation increase this risk", the CDC stated on Friday in a post that has since been taken down. Now, months after being discovered, one important observation has made its way into CDC's list of ways you can catch coronavirus-and it will change the way you protect yourself.
The Centers for Disease Control and Prevention has, again, changed its guidance on coronavirus testing, stating that people without symptoms should get tested "due to the significance of asymptomatic and pre-symptomatic transmission". The recommendations that come with aerosol transmission are far more restrictive, including the closure of many indoor activities where masks are impossible to wear. "In general, the more closely a person with Covid-19 interacts with others and the longer that interaction, the higher the risk of Covid-19 spread", it said.
These particles can cause infection "when inhaled into the nose, mouth, airways and lungs". "Cloth masks are not created to block aerosols". It also emphasized the importance of ventilation indoors.
"They've been paying attention and moving in response to research, so I'm glad to see that they're continuing and that there's nobody getting in the way", he said.
Milton and Jimenez were among a team of researchers who wrote an open letter to the World Health Organization, which eventually signed 239 researchers from 32 countries, who called on officials to accept the possibility that aerosols could play an important role in spreading the virus.
"That policy does not reflect what many people at the C.D.C. feel should be the policy", an anonymous federal official told the outlet.