The US CDC has revised the listed modes of SARS-CoV-2 transmission in the scientifically short part of its public guidelines on Covid-19 to include the possibility of the virus being transmitted into the air. A Report in the Lancet Medical Journal in April rejected the predominant scientific view that the virus was not an airborne pathogen.
Most researchers and experts have stuck to this view since the Covid-19 pandemic began last year Covid-19 was not in the air and transmission was only through droplets of respiratory fluids from an infected person. That view has now changed with virologists and immunologists suggesting that transmission on such a large scale would only have been possible if the virus had been in the air.
In his last order, the World Health Organization (WHO) also said: “Current evidence suggests that the virus mainly spreads between people who are in close contact with each other, typically within 1 meter (short range). A person can become infected when aerosols or droplets, that contain the virus are inhaled or come in direct contact with the eyes, nose or mouth. “
Researchers in Sri Lanka also claimed to have discovered a new variant of the coronavirus that they said they could stay in the air for almost an hour. “The new strain is in the air, the droplets can stay in the air for almost an hour,” Neelika Malavige, one of the island’s leading immunologists, told the media in April this year.
On its scientific mission, the United States Centers for Disease Control and Prevention (CDC) While the understanding of how SARS-CoV-2 is transmitted has shifted, ways to prevent infection have not changed.
This means that the use of face masks (double masking), hand hygiene, and social distancing remain the best ways to prevent infection even after vaccination against Covid-19.
Two #masks can increase your protection against those #Coronavirus. #DoubleMasking was recently confirmed by the US CDC as a stronger barrier to the virus than a single mask. Here are the DOs and DON’Ts of double masking: #GOD #MaskUp # Covid19 #RE pic.twitter.com/N3iomgvDIG
– IndiaToday (@IndiaToday) April 27, 2021
“Modes of SARS-CoV-2 transmission are now categorized as inhaling viruses, depositing viruses on exposed mucous membranes, and touching mucous membranes with dirty hands contaminated with viruses,” the CDC said.
According to the leading US medical panel, exposure to respiratory fluids that carry the coronavirus is the main mode of transmission. This can be done in three ways:
- Inhalation of very fine breath droplets and aerosol particles
- Deposition of respiratory droplets and particles on exposed mucous membranes in the mouth, nose or eyes due to direct splashes and sprays
- Touch mucous membranes with contaminated hands
What are respiratory fluids?
Breathing fluids are droplets that people release when they exhale. It is through these droplets that an infected person can transmit the virus.
According to the CDC, the largest droplets settle out of the air quickly.
However, the tiny, very fine droplets and aerosol particles that form when these droplets dry quickly are small enough that they can float in the air for minutes to hours.
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