It is extremely unlikely.
Firstly, in the case of viral disease and other disease there are always people who are for some reason immune.
Secondly, when the need arises the medical world will undoubtedly come up with methods to fight them.
Take Coronavirus, within months the medical world developed several vaccinations to counteract the devastating effects, especially deaths.
Normally even after developing this type of vaccination it can take 10 years before they are passed as safe for use on the population but with the whole medical world searching for a vaccine this only took a matter of months.
We all know that the current vaccines will not cure or prevent the virus from affecting people but it has saved countless people from severe the terrible effect experienced prior to the vaccines being developed and given to the world.