What I cannot get my head around is that the common cold is a coronavirus and yet after donkeys years of research into the common cold, we never managed to come up with a vaccine. And yet in a matter of months, with COVID-19, we have a vaccine.
Now there could be various reasons for this. Perhaps with a cold, we just didn't try very hard because it doesn't kill people. But in a way, that seems unlikely to me when you consider the misery colds cause, to billions of people every year. Another possibility is that it's really, really difficult to come up with an effective vaccine for coronaviruses. I believe the reason you can catch a cold every year - having already had one - is because the virus is constantly mutating. Maybe this is why its so difficult to come up with an effective vaccine? Just as it's impossible for the human body to naturally develop resistance to the common cold, maybe it's also impossible to cause the body to develop immunity by vaccinating, because the virus is always mutating to something which is not protected by the vaccine.
It seems extremely possible to me that this could be the situation we find ourselves in with COVID-19. What if the vaccines don't work on the new virus? What if people who have had COVID already, are not immune to the new variant? These are worrying concerns. It could well be the case that we are never going to get rid of this thing and our only approach is to accept that we have to live with it, and the best we can do is to try to find treatments which stop people from dying when they eventually catch it, as perhaps we all will?