A vaccine programs your immune system so that the immune system does the work. With chemoprophylaxis, the immune system is either out of the picture (not part of the game plan for dealing with the virus), or it might interact with the part of the immune system that does not need to be programmed (innate). People with a weakened immune system benefit more from chemoprophylaxis than with a vaccine (in general), but our current bureaucrats/administrators do not seem to understand that.

The person giving the presentation has a habit of using ideas that are beyond what a layperson is expected to understand. However, I did get one actionable thing out of it: That taking early treatment within 3-4 days of symptoms is probably not going to be soon enough, unlike a year ago.

A vaccine programs your immune system so that the immune system does the work. With chemoprophylaxis, the immune system is either out of the picture (not part of the game plan for dealing with the virus), or it might interact with the part of the immune system that does not need to be programmed (innate). People with a weakened immune system benefit more from chemoprophylaxis than with a vaccine (in general), but our current bureaucrats/administrators do not seem to understand that.