It was 2015 for the tweet, who knows about the picture.
But SB277 was to remove "personal belief" as a reason to not get kids vaccinated for public school or daycare.
https://en.wikipedia.org/wiki/California_Senate_Bill_277
So, definitely stupid and uninformed. But that was way before covid and a shit ton of Hollywood actors had the same opinions.
And also has nothing to do with the flu in the next pic, or covid.