A mutating monster
aids experts got another piece of bad news: patients are passing on strains of the virus that resist one or more drugs. Consequently, the minute some people get infected, there will be some drugs that will probably be ineffective. Very soon there may be a need to see if it will be worth testing these patients to find out which drugs their virus is resistant to, and tailor their treatment accordingly. The efforts will be to try and avoid the frightening prospect of facing a