COVID-19 spreads mainly through infectious material, especially respiratory droplets that are released when an infected person coughs or sneezes. People who are nearby can become infected by inhaling the droplets or by coming into contact with them. Infection can also happen through contact with a contaminated surface, following by touching of the mouth, nose, or eyes. Older adults and those with chronic illnesses face greater risk of infection because their immune function may be weakened.
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