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Infection and transmission

Can 1 particle of COVID-19 get you infected?

Can I catch COVID-19 from my pet?

Can I contact the coronavirus disease by touching a surface?

Can someone test negative for the coronavirus but be a carrier?

Can the coronavirus spread through the air?

How contagious is COVID-19?

How does COVID-19 spread?

How long does COVID-19 live on surfaces?

What way are you more likely to catch COVID-19?