..... Viruses are efficient. Once released, they will routinely evolve to circumvent any vaccine. That is their nature for it is how nature survives – survival of the fittest. It will mutate to survive and in the process, it may kill the very host it is infecting. There is a 13-year cycle in Influenza outbreaks which was reported on January 26, 2020. The last pandemic with respect to the strain of the Influenza was 2009. The next one of those to reach a possible level of a pandemic will be in 2022. This is where the largest death toll appears...