Hello sir on 20march I am suffering from high grade fever that's why I visit a local doctor don't know have verified practitioner or bhms and their nursing staff use a common needle to fill medication but I think he use syringes pump don't know but I have fear that may be its used that's why I start pep with in 20 hours pep medicine is VIROPIL AND taking 28 days continuous with out any gap and I have done two duo test on is 28 th day of exposure and other was 35 days both are negative next when should be done and if I want to done TRI DOT ON 90 days its conclusive or not or should done at 45 days