"It's worth it to protect against it," said Thomas Coates, professor of medicine at UCLA's Geffen School of Medicine in Los Angeles. "The vaccine should be standard of care. Men should get it before they become sexually active."
That ounce of prevention, experts say, can go a very long way.
"If men don't get infected because they're vaccinated or because they use condoms, they won't infect women," said del Rio.
ABC News' Dr. Katherine Takayasu contributed to this report.