The narrative shifted from the Covid shot protects you from getting Covid to it protects you against hospitalization and severe illness. Never mind the booster further lowers your immune system making you more prone to illness. Of course a Big Pharma will never admit SIDS and autism are assisted by the bombardment of foreign objects into the fragile immune systems of babies and young children. Is it the entire cause? Maybe, maybe not. There may be many factors-nutritional health, genetics, environment, etc.