Why It Matters: Rates of S.T.I.s are skyrocketing.In 2021, there were 1.6 million cases of chlamydia, more than 700,000 cases of gonorrhea and nearly 177,000 cases of syphilis in the United States, together tallying up to $1.1 billion in direct medical costs. (Rates of babies born with syphilis also soared that year, with nearly 3,000…
