I have some few questions regarding HIV and AIDS

NEET PG Medicine
#1

I have some few questions regarding HIV and AIDS.

  1. After how long does one start to have symptoms of HIV/aids after being infected??
  2. Is it possible for one to live for over 15 years with the virus without medication?
    3 ) Is it true that Type “O” blood doesn’t contract HIV? Or it doesn’t make a person of that type to get AIDs even if the virus is in his/her blood???