Are there any common immunisable illnesses that you don't know whether you're immune to?

[Dilbertian]

If you were born before the late 70s, do you know your immune status? I, for example, had all of the few immunisations available for my time, and had most of the common illnesses, but I don't know whether I have had mumps. So, when ds had mumps at university (despite being MMR'd) I had a dilemma: how can I bring him home to look after without putting myself at risk?

In light of the current pandemic draining the NHS, and the regular epidemics of MMR illnesses in every university (and that I have more dc to wave off to uni over then coming years), I wonder whether adults with doubts about their immune status should look into having the jabs that weren't available during their childhood.

I'm a bit older than you.

I've never had mumps, nor the jab.

I had measles (older than jab) and chickenpox. Others by immunisation, including polio on the sugar lump, DT, BCG and rubella.

Plus an armful of travel jabs as an adult

DC fully immunised on NHS schedule for their age (youngest not offered BCG, boys too old for HPV)

I'm younger, I've never had chicken pox, I assume I have immunity as my brothers had it when I was a child and DD has had it. I didn't realize the danger to babies of chicken pox when pregnant with Dd.

If I was planning to have more DC I would pay for a vaccine/or to get my immunity checked.

I have had mumps and chickenpox, think I might have had german measles too.

I don't know if I had a measles vaccination. I had the polio and TB ones when I was at school though.

I think you can be immune but not had any actual symptoms. Sub clinical ? Basically you get the disease and make antibodies and fight it off before they it actually make you ill.
Hopefully somebody with more up to date medical knowledge will come along and confirm whether I am right or not (very old biology degree and rusty memory)

So quite likely to be immune to lots of diseases you've been exposed to but you wouldn't actually know you are.
Young and old tend to get flu viruses which come round in cycles. Young because they weren't alive the last time they last time it came round and the old because their immune system isn't working as well any more so they've lost their immunity.

So quite likely to be immune to lots of diseases you've been exposed to but you wouldn't actually know you are.

And quite likely not to be. My elderly uncle had never had any of the childhood illnesses. He must have an amazing immune system because he has always been unfeasibly heathy, never catches anything (but thinks he's immortal and falls out of a tree in his 70s and is surprised when he breaks his arm). He gave my ds a cuddle the day before ds came down with chicken pox. Literally just one cuddle. DUncle caught chicken pox and ended up in hospital. Fortunately made a full recovery.

Scarey.

I have had measles, mumps, chicken pox as a child, more than one tetanus shot, BCG, yellow fever and smallpox. The last was due to an outbreak in Germany in 1972, one of the last anywhere in the world.