Since Google is taking such a strong position against what they view as COVID19 misinformation, are they liable if I get sick as a result of some misinformation that managed to get through their filters? I might not try to go after some small time app developer or other rando on the Internet, but if Google is willing to stand behind their guarantee with those wonderfully deep pockets...
Censorship of any content implies approval of all remaining content. One can't be protected from liability as a common carrier if one is curating.
So if you have been provably harmed by anything Google has served you, you can sue the owner of the content and join Google as a defendant.
(Not a lawyer.)