Communities aid in prevention by providing vaccination education. A lot of people don't take vaccines because they believe won't be affected by viruses, but this a result from lacking education about vaccination. Through educational campaigns like this, people can know more and better how a vaccine works, why they should take it, what are the different viruses in the environment, what are the risks if they don't vaccinate. Through this prevention campaign, communities will be helpful.
I would say a because he ran too much but that would be just me I think he hurt his knee from running too much more exercise but probably just aggravate his condition I could be wrong but this is what I think
not following the protocol like your supposed to store your chicken and eggs on different levels of your fridge and fish so you don't get them near each othwr
