Abraham1, though the Covid-19 vaccines might not work well for new strains of Covid-19, regarding all vaccines do you really believe that "vaccination serves no useful purpose other than a mental satisfaction"? My doctor (as part of my physical), after pulling up my vaccination records from a database, told me to get the shingles vaccine. She urged me to do it soon, instead of waiting a few years. [Even before my doctor told me to get it, I had already decided to get, though I was in no hurry to get it. My prior doctor, now retired, when I saw him three years ago also said I should get the shingles vaccination.]
My high school biology textbook (copyright 1977) says how the first vaccine was discovered, namely the first one for small pox (developed by Dr. Edward Jenner way back in 1796) and that the vaccine was a success! The textbook also mentioned the success of the rabies vaccine developed by Louis Pasteur way back in 1885! The textbook also mentions polio vaccines and typhoid vaccines, and it says regarding those vaccines that "they cause antibody production and create immunity." I have thus known for decades that a number of vaccines work. The science says many vaccines work and I believe in science. Do you really believe the following vaccines don't work: small pox, polio, chickenpox, measles, mumps, diphtheria, tetanus, Hepatitis A and B, and rabies? Do you really believe that none of the available vaccines listed at https://www.who.int/teams/immunization-vaccines-and-biologicals/diseases work?