The 110 million isn’t necessarily 110 million people. There are people with multiple STD’s as well as people getting an STD again after it was cured.
Agreed. You could have a kid with herpes for life and one or two more STDs for life.
Unfortunately, about a quarter of all young adults have HPV, so it is a big chunk of the population even if multiple infections make up the rest of this 110 million STIs.