Scientists detected PERVs in several pig cell lines used for xenotransplantation research.

Report any pervs you see near the playground to the police immediately.

Whenever she passes by, he pervs and it makes her uncomfortable.

He perved at the woman reading on the subway until she moved away.

I caught him perving at the beach through the fence.

Several perves were asked to leave the library after staff received complaints.

He perves over the photos on the forum, leaving offensive comments.

Everyone in the office avoided sitting next to the perve who always lingered near the break room.

He tends to perve at strangers on the subway.

Researchers are studying PERV to assess the safety of xenotransplantation from pigs to humans.