Schlossberg took to Instagram less than a month after deleting his accounts as some sort of penance for insulting RFK Jr.'s voice. Now he's back, and calling out the Curb Your Enthusiasm star, who seems to have abandoned her own Democratic leanings to support her anti-vax husband's role as President Donald Trump's Health and Human Services secretary.

"Cheryl Hines, it's Jack Schlossberg," he says in the video after apparently emerging from the shower in a towel -- a nod to a video Hines posted of RFK Jr. post-shower last November. "We've never met, but I've got a favor to ask. I need you to call up the family of the child who died of measles and say 'sorry.'"

"Can you do that for me, babe?" he asks, condescendingly.

Texas, one of the states facing the highest concentration of measles cases in recent weeks, announced its first death from the preventable disease since 2015 late last month. The Texas Department of Health reported that the "school-aged child" was not vaccinated. Its website also reported that the state was coping with 124 confirmed cases of measles since the outbreak began in January, and that 18 people have been hospitalized since then. The WHO and CDC foresaw that measles would become an "imminent threat" in 2022, when the number of unvaccinated children hit a record high of 40 million.

Still, newly sworn-in Health Secretary RFK Jr. has stuck to his unfounded theories about the supposed dangers of vaccines. Asked to comment about the death of the Texas child from the disease, Kennedy said, "It is not unusual" and "Measles outbreaks happen every day." He then suggested "Vitamin A" as a potential solution to the worsening crisis, even after facing backlash from the administration's own supporters as the outbreak worsens.

Kennedy ultimately admitted it was "serious" last week.

Schlossberg, perhaps considering his cousin to be a lost cause, trolled Hines instead on Thursday. "Almost every single case of measles is in someone who's not vaccinated," he adds in the video.