While this advice is good, the article is discussing HSV (herpes simplex virus), not HPV (human papilloma virus), which have quite different symptoms and epidemiology. There are, as yet, no approved HSV vaccines.
Second part of the PSA, one should keep prophylactic antiviral medication on hand incase you get exposed to someone with HSV. With 60% of the population positive for HSV, everyone should have an antiviral on hand. acyclovir, famciclovir and valaciclovir
https://www.ncbi.nlm.nih.gov/books/NBK525787/
And where/how does one acquire them from?
They’re available OTC basically everywhere.
They're not OTC medicines. They are prescription-only medicines.