Section 240 protects you from users posts, but not necessarily from promoting them above others algorithmically. You could find them liable for their prioritization choices on the timeline over one that just displays things chronologically. It’s been down time and time again that the display is not a chronological one to increase engagement. That is an editorial decision that should be liable for.

I’m not sure how you are defining mortality, but in the US alone there was from March 1, 2020, through the end of 2020, there were 522,368 excess deaths in the United States, or 22.9% more deaths than would have been expected in that time period. That went drown significantly after the vaccine…

Source: https://en.wikipedia.org/wiki/Statistics_of_the_COVID-19_pandemic_in_the_United_States (have not checked grokopedia for alternative facts)