Well, the chances that someone has ONLY used meth in their life is very slim. AIDs can be obtained by sharing needles. Also, if you are in a high drug rush due to methamphetamine and you cannot recall your actions, you may have unknowingly had sexual intercourse with an infected person. Also, HIV and AIDs lowers the body's defense mechanisms by depleting the white blood cells which fight off pathogens and harmful microbes. So pneumonia can cause someone to only live for a few days if their body is unable to fight off the illness. Sorry about your luck.