Why do some vaccinated catch COVID and others don't ?

[strugglingmummy2021]

Just curious if anyone can explain.

Say two people are vaccinated and exposed to the virus, one gets COVID and the other one doesn't, why is that ? Did the one who got COVID not have antibodies ?

Or say I'm vaccinated and don't catch it the first time I'm exposed, but then I keep being exposed many times and eventually it ' breaks through '- as I've had so much exposure ? Or is the fact that I didn't catch it the first time, a sign that I'm unlikely to catch it if I'm re-exposed ( putting all the current talk about length of immunity aside- or maybe not.. )

Just wondering if anyone knows?

I think genetics has a lot to do with it

I’ve never ever had norovirus or any other sickness bug - but I get a cold if someone even looks at me

I caught covid in April last year. It was before testing so I can’t prove it but I lost my sense of taste and smell for the first time in my life as well as the usual symptoms - and once it came back I hate onions and coffee smells - classic symptoms so I had it.

I caught Covid about a month after my second jab. DH didn't isolate from me at all and he never caught it. We both had our second jabs on the same day so were equally vaccinated with pfizer.

I take a DMARD for arthritis which can have a mild immune suppressant effect and I think that is partially why I caught it and DH didn't. I've had to stop taking them whilst I'm poorly with Covid. I have been able to manage my Covid at home with support from a Covid monitoring team due to my underlying conditions (autoimmune inflammatory arthritis, ehlers danlos and asthma). Covid has knocked me for 6 though and I've been struggling to shower etc. I am in my early 30s. I'm very glad I'm vaccinated as I fear I may have been very poorly without the jabs.

I think sometimes it's just luck - perhaps I caught Covid in a shop or somewhere DH didn't go and he was then lucky not to catch it off me.

Interesting thread. I am double vaxxed and currently in hospital with covid. I happen to know I did have antibodies because I test monthly for research. However I am immunosuppressed so perhaps didn't achieve maximum protection. The doctors say the vaccine has still helped me.
DH is 71 and has remained negative.

You'd have to read the research on immunity to start to understand that. It's no different for HIV, Elboa, measles, tb, chicken pox etc. The reason why they are talking about boosters is because some vaccinated 60+ year olds are already showing poor immunity. Read around the flu vaccination percentages per age group and that explains it as well. Which is why those not at risk from flu/Covid need to be vaccinated.