Reviewed by medical experts • For informational purposes only
COVID spreads through the air we share indoors - tiny particles from an infected person's breath, talking, coughing and singing, hanging longest in closed, crowded, poorly ventilated spaces. Variants keep the virus evolving, and risk of severe illness rises sharply with age and certain conditions. What actually causes infection, and who needs to stay careful.
COVID-19 has one cause - infection with the SARS-CoV-2 virus. What varies is how it reaches you and who gets severely ill. Both halves matter for prevention.
The virus mutates steadily; new variants differ in how easily they spread and how well they dodge immunity. This is why infections recur despite past illness, and why updated boosters target recent strains. Variants have consistently been handled by the same toolkit: vaccination, ventilation, and early care for the vulnerable.
Anyone - immunity from vaccines and past infections reduces severity more than it blocks infection. Repeated mild infections are common in healthy people.
5G, cold weather, non-veg food, and the rest of the WhatsApp list. The cause is a virus through the air - everything else is noise.
COVID spreads through indoor air from infected people; anyone can catch it, but severe illness concentrates in the elderly, the chronically ill, pregnant women and the unvaccinated - the groups protection is built around.
Written By
Dr. Daksh
BDS
Reviewed By
Dr. Varun Gupta
MD Pharmacology, MBBS
Last updated on
27 Sep 2022 • 06:23 PM (IST)
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