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I hope this doesn’t sound silly but I’ve been wondering, will people be at risk of contracting covid-19 if they breathe in second hand smoke from someone who is infected but does not know it yet?

E.g. if you are a passerby / happen to be in the vicinity of a smoker who is infected. 
Dr. Aditya S
Space Doctor
4 Streak Score Doctors are able to put a streak together by performing an activity everyday

Thanks for your question and no worries it's not a silly question! Short answer to your question is no we are unlikely to contract the virus from the second hand smoke. 
If we are however standing close to a smoker, and he/she were to cough, those droplets released into the air are potentially infectious. 

Don't worry! Stay safe, mask up, wash up! 
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