You are incorrect, after 3 weeks, the immune system is still mostly intact, T4 levels are going down after months, HIV is still incubating
12-21 days after exposure about 1/3 of people who acquire hiv may get symptoms of something called “acute retro viral syndrome” that’s what op was addressing.
Source: thought I got hiv went into panic mode and researched the f*** out of it
Men, please ease your minds on hiv with the famous Nancy Padian study