It was an ironic start to a class-action lawsuit: Notices mailed as part of a settlement of a previous class action alleging that Aetna Insurance Co.’s mail order requirement for medications violated HIV patients’ privacy allegedly revealed insureds’ names and conditions through glassine envelope windows. Now Aetna is facing another class action, this one in federal court in Philadelphia, over claims that it failed to protect HIV patients’ privacy.

The lawsuit was filed in August by a man using the pseudonym Andrew Beckett, who, according to court papers, feared “severe harm” would befall him should his true identity be revealed.