Katie Couric said she regrets devoting too much of a recent “Katie” segment to the adverse effects of HPV vaccinations — and not enough time to their relative safety and effectiveness.

The talk show host has received blistering criticism in the media, with detractors claiming she gave too much credence to vaccine critics and did not emphasize scientific studies suggesting HPV vaccines such as Gardasil are highly effective.

“Following the show, and in fact before it even aired, there was criticism that the program was too anti-vaccine and anti-science, and in retrospect, some of that criticism was valid,” Couric said in an opinion piece Tuesday on the Huffington Post. “We simply spent too much time on the serious adverse events that have been reported in very rare cases following the vaccine. More emphasis should have been given to the safety and efficacy of the HPV vaccines.”