<qa>  What is the highest risk-group for HIV infection within the last 6 months?- Is in high risk-group for HIV infection within the last 6 months i.e., men who have had unprotected sex with men, women who have had sex without a condom with men who have sex with men, people who have had sex without a condom with a person who has lived or travelled in Africa, people who inject drugs, people who have had sex without a condom with somebody who has injected drugs, people who have caught another sexually transmitted infection, people who have received a blood transfusion while in Africa, Eastern Europe, the countries of the former Soviet Union, Asia or Central and Southern America. 