No. The Johnson and Johnson vaccine can maim or kill you with just one dose! No second one required. It is made with aborted fetal cells.
https://www.axios.com/moderna-nih-coronavirus-vaccine-ownership-agreements-22051c42-2dee-4b19-938d-099afd71f6a0.html
This story is old, but indicates the NIH and Moderna share a stake in the Moderna "vaccine" for the CCP virus.
I don't know. The use of fetal cells in vaccines is really dodgy. Sometimes cells from multiple abortions are used to generate a cell line that is usable for growing viruses. In some cases women have been lied to in order to get them to abort a child they are told will have birth defects. An anon posted a link to the testimony of Stanley Plotkin "godfather" or some such of vaccines. He reluctantly admitted that dozens of abortions were used to derive one fetal cell line for vaccines. Evil and disgusting, imo.
Fetal cells are absolutely TERRIBLE to use in vaccines. This site explains why.
https://soundchoice.org/