Most children can be host without suffering it and transmit it to other people. For middle age people, if you are unlucky and get other virus at the same time(

Most children can be host without suffering it and transmit it to other people. For middle age people, if you are unlucky and get other virus at the same time(because you met with lots of people in a place), like the flu, it can be extremely dangerous. Last year I catched two virus at the same time and it was so painful. My body reacted too strong with an autoimmune reaction, attacking my own body, my joints, my muscles. It took me two months to properly recover, and I live a very healthy lifestyle. I sleep and eat well and exercise. The doctor told me that someone in the same situation that smokes for example could develop lots of complications.