 I don't poo poo examples. There are side effects to almost any vaccination, almost any medication and some even have strong reactions to food. So, what is one to do ? My Sister took a blood thinner that caused a brain bleed. How did She know She would have that reaction ? Xarelto is still on the market. Everyone is the same and everyone is different. Harsh reality. Having worked in the field all I can tell you is the gene developments in the last 00 or so years has improved exponentially. Immune systems are comprised of several specialized cells and organ functions. Who has how many of each type . who knows. I have heard over the years a child protected from all antigens is going to have a hard time in life as their body has not been exposed in low doses to all the things he will be exposed to later. Dust, pets, grass, pollen, food, saprophitic bacteria,, and yes viruses. Why do you think a cold is never caused by the same virus - the person has developed an immunity to that specific virus. The Corvid vaccine is developed against that specific virus, more specifically the virus spike protein, which is just one spot on the virus. 