Answers and Explanations:
1.) I am going to say this is an opinion, because this isn't true. Just because someone got this, doesn't mean that someone is safe from getting it again.
2.) I would say that this is an opinion because anyone can be susceptible to this illness, especially if the person is around someone that is contagious, or just by someone being unsafe in public.
3.) I would say that this is not an opinion, because this illness is a new type of an illness that was discovered before. The only difference is, is that it is mutated.
4.) This is not an opinion because this statement is true. Everyone reacts differently to this illness, so it is different for different people.
5.) This is definitely an opinion because this statement is not true. It all depends on the intensity of the case how the patient reacts to this illness. Not only that, but it also depends on the type of this illness that the person got.
(Numbers 6 - 10 do not include any questions, so I cannot answer them.)
I hope that this helps.