To be clear, there are plenty of virus vaccines that are lifelong. It is unfortunate that the covid mutates as fast as influenza, but it was not a given at the

To be clear, there are plenty of virus vaccines that are lifelong. It is unfortunate that the covid mutates as fast as influenza, but it was not a given at the beginning of the pandemic. Many scientists claimed that enveloped viruses were less likely to mutate, and that the covid vaccine would likely maintain immunizing effectiveness for years. It was a disappointing outcome, not an obvious one.