If measles is caused by a virus and it can only be caught once in a life time, why do we catch the flu every year?
When we have the flu, in a few days the body seems to get rid of the virus. The symptoms rarely last for two weeks and, in a higher period; [...]
If you think that all problems are solved after you have read all about the long vaccine production, you’re wrong. There is still the issue of distribution:
As the vaccine manufacturing process is slow and continuous, it is not possible to produce enough doses for everyone. Nowadays, our yearly vaccine production is of 700 to 900 [...]