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Back to All FAQs. Drafted 14 September The study on surfaces also did not consider how the virus might travel through the air in everyday situations. SARS-CoV-2 spreads via respiratory droplets, which are tiny drops of liquid that enter the air when a person coughs, sneezes, or talks. A May study found that loudly talking can emit thousands of these droplets into the air, remaining airborne for around 8—14 minutes in a confined space.
The World Health Organization WHO state that coronaviruses need a live animal or human host to survive, and that they cannot multiply on food packaging surfaces. The WHO suggest washing fruits and vegetables as normal and washing hands thoroughly before eating. If a person believes they have symptoms of COVID, or they may have been exposed to the virus that causes it, they should self-isolate in their home and call a doctor.
Do not visit a healthcare facility without calling ahead first. The best way to prevent COVID and stop transmission to others is to avoid exposure to the virus that causes it. The CDC recommend:.
People can transmit SARS-CoV-2 even if they do not feel sick, so it is essential to follow these guidelines at all times, wherever possible. In people with severe illness, it may last up to 20 days. In some people, low levels of the virus are detectable in the body for up to 3 months, but by this time, a person cannot transmit it to others.
There is currently no evidence the virus can survive in food, but early evidence suggests it may last several hours on copper, 24 hours on cardboard, and up to 72 hours on plastic and steel. However, this does not necessarily mean the virus detected on these materials can trigger an infection.
Scientists are still studying how long SARS-CoV-2 can last on surfaces and clothes, and how it can travel through the air. Following guidelines for cleaning, hand washing, and masks can help keep the risk of transmission low.
COVID can cause lasting symptoms, complications, and distress, and doctors are still unsure of the full scope of the long-term effects. Official websites use. Share sensitive information only on official, secure websites. JavaScript appears to be disabled on this computer. Please click here to see any active alerts. The droplets or aerosol particles vary across a wide range of sizes — from visible to microscopic. Once infectious droplets and particles are exhaled, they move outward from the person the source.
These droplets carry the virus and transmit infection. Indoors, the very fine droplets and particles will continue to spread through the air in the room or space and can accumulate.
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