@MrHodgeymaheg I think the OP's point is that there isn't a vaccine, so we are pretty much defenceless against it and just have to hope it doesn't spread, that we won't get it and if we do, that we aren't the ones who die of it.
It's a reality check of just how vulnerable we are without vaccination.
Without vaccination, it wouldn't be just Covid 19, it would be all influenza, Measles, Mumps, Rubella, Chickenpox, Diptheria, Tetanus, Polio, HiB, MenC, Hepatitis B, TB, Smallpox, Whooping Cough, Yellow Fever, Rotavirus, Pneumococcus, Cholera, Hepatitis A, Encephalitis, 4 types of Meningococcal Meningitis, Rabies, and Tick Borne Encephalitis that we have to worry about.
I knew people (including a baby) who have died, were disabled or seriously ill from preventable diseases. I'm not that old, I'm middleaged. I was hospitalised aged 26 due to somebody not believing an infectious child should be at home instead of transmitting their disease to a pregnant women. I know what it feels like to be collapsed on the floor without enough breath in my body to reach the phone to call for an ambulance and be stuck there for three days (I was about 24 and perfectly healthy). I knew people whose children lost limbs from meningitis. I know what it feels like to not fancy going in for double Physics on a Monday morning, sit on the sofa and then wake up on Friday afternoon two stone lighter.
The complacency about vaccination is as a direct result of there being vaccinations - we don't all remember what it was like to come in and be told in class that Nicola is back but we mustn't say anything to her about her baby brother because he died, of being told making a Get Well Soon card for Stewart is a lovely idea and then the cards are hidden because he's in intensive care with Tetanus and the teachers are waiting to see whether he makes it before sending them on - of the baffling assemblies where 'a little child has been taken up to live with God' and coming out, not realising what they meant, but somebody saying 'Sara's died, we saw the ambulance come to her house and her Mum was screaming in the street'.
Covid reminds some of us of that feeling of helplessness, wondering who will be there on Monday. Or being told when we ask for ice cream because we've been in bed all week with Measles and say we're going to play with David when we're back at school 'Oh, no, David's Mum and Dad have moved away so he can go into a special hospital to be looked after'.