Here’s why the NHS were happy to vaccinate me with MMR the other day. From UK govt guidance from
2019:
• individuals born before 1970 are likely to have had all three natural infections and are less likely to be susceptible. MMR vaccine should be offered to such individuals on request or if they are considered to be at high risk of exposure.
Tl;dr: younger GenX and older Millennials in the UK were likely given inadequate protection against measles and none against mumps and rubella: vaccinate on sight.
Older GenX and boomers: just give them the vaccine if they ask for it.