I have a similar question to our friend that had a Thai
experience. I had a sexual ecounter in a Thai massage
parlor in Geneva. Used a condom but the oral sex although extremely short, was not protected (I received). The difference with me is that I had a Zona or Varicela Zoster vius a month ago. Apparently it hits mostly older people and hiv infected. Few weeks later got cold and headaches, stiff neck and two uncomfortable red dots on my neck.