Positive and negative interactions greatly affect participation in a physical activity. For positive interactions, it encourages participants to have physical activity thus having physical function. Companionship with friends also is a positive effect especially with adolescents. On the other hand, negative attitude would mean the participant would not exert any effort in participating any activity.
Everything basically has bacteria so if you touch someone that’s sick and they sneezed on their hand if you handshake that person or touch their hand the germs are on your hand now of course you can wash ur hands but there’s still bacteria on your hand it’s confirmed that everyone atleast touches their body 16 times and hour so that’s how it spreads to our body
Particulate Matter or PM should be your answer.