Currently, the agency's guidance says the virus mainly spreads from person to person through respiratory droplets, which can land in the mouth or nose of people nearby.
According to the CDC, these particles can be inhaled into the nose, mouth, airways, and lungs and cause infection.
"Airborne viruses, including COVID-19, are among the most contagious and easily spread", the site now says.
Earlier in July, the World Health Organization (WHO) also admitted the possibility of airborne transmission of the novel coronavirus in closed, poorly ventilated, crowded places such as during choir practice, in restaurants or in fitness classes.
Now the page has reverted to what it said before - that the virus spreads between people in close contact through respiratory droplets.
Previously, the CDC had suggested maintaining a physical distance of six feet, disinfecting surfaces, regularly washing hands, and using masks as ways to curb the spread of the virus and prevent one from getting infected.
Oxford vaccine trials paused
Oxford University, AstraZeneca's partner on the vaccine, has already resumed its trial in Britain. At this time, it's not known if that event was related to the vaccine.
In a section of the agency's website titled "How COVID Spreads", the CDC acknowledged for the first time that "droplets and airborne particles" can stay in the air and infect others - a mode of spread that has been supported by widespread evidence for months, and which President Trump acknowledged in a February phone call with Bob Woodward. On Sunday it was noticed and reported by CNN, while on Monday the Washington Post reported that the CDC seemed to be coming around to the position advocated by "independent experts" for months - that aerosol transmission of Covid-19 was a thing and that indoor ventilation was key to protecting against it. On Friday, the CDC quietly updated a page on its website on how the virus spreads.
With these discoveries, the CDC has also updated its prevention measures.
Throughout the crisis, scientists have been working to understand this new virus and make recommendations to all of us how we can best avoid catching covid, without causing too much inconvenience to our lives, and here in Spain, the wearing of masks in public is a measure which is now mandatory, much to the disgust of some.
Various scientists had earlier spoken about the viral transmission of the coronavirus.
"While the current [coronavirus] specific research is limited, the results of available studies are consistent with aerosolization of virus from normal breathing", according to the letter, written by Dr. Harvey Fineberg, former dean of the Harvard School of Public Health and chair of the NAS' Standing Committee on Emerging Infectious Diseases and 21st Century Health Threats.
"I'm very encouraged to see that the CDC is paying attention and moving with the science". The guidance also stated that these particles might travel further than six feet.