All viruses are here to stay. The only differences are that the population becomes immune to them so they are no longer a problem.
The only reason why one would need a vaccine is that it is a way of infecting people with a safer dose of the virus so that ones body "Learns" how to cope with it without being overwealmed by it. Now tere is a period of danger that the one who is vaccinated must not come into contact with those who have not had it for a certain period of time. Now the reason for this is that one is carrying the virus or disease, and if one comes into contact with others before ones own body has dealt with it (When the virus is classed as "Live") one will be spreading the full on virus to others. With the flu jab this period was 48 hours that one was supposed to avoid contacting others. With covid, the period of time is a lot longer.
But the idea is that ones body will be able to cope with the virus in much the same way that years ago, parents used to try to give chicken pox or german measles to their children when young by finding out if anyone in the village had it, and they would take their kids to play with the child who had it. The reason foe this, was that it was better for a young child with a healthy immune systemto learn to fight the viruses off, then if they caught them later in life which could be more life threatening to them.
Vaccines do this same thing but in a much more controlled effect where one gets a partial dose, where the caccine becomes "Live" when it enters ones body and ones body then fights it off... But bear in mind a vaccine is a small dose rather then catching the virus by natural means which would be a full dose if that makes sense?
One thing I need to make clear is that anyone who has or has not had the virus will have the same potential to carry the virus, and those who have had the vaccine, will be contageous foe a certain period of time.
There sems to be the thought that if one has had the vaccine, that one can not carry the virus to infect others, and this is completely false. BUT, the advantage is if the vaccine works, then one will be fighting off the virus if it returns, but ones body already knows how to win the fight. In this way someone who has already caught the virus and survived does not ned to be vaccinated as their body has already learned how to fight it.
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