noun which may take the genitive case particle 'no', noun
unvaccinated; not inoculated
Used primarily as a no-adjective or noun in medical, public health, and news contexts to describe people who have not received a vaccine. 'Unjabbed' is a colloquial English equivalent but not a direct translation of the Japanese register.
未接種の人は、感染リスクが高いとされています。
Unvaccinated people are said to be at higher risk of infection.
この地域では、未接種者がまだ多くいます。
There are still many unvaccinated individuals in this area.
未接種者 explicitly refers to an unvaccinated person, whereas 未接種 can be used attributively (未接種の人) or as a noun.
Compound of 未 (mi, 'not yet') and 接種 (sesshu, 'inoculation, vaccination'). The reading みせっしゅ follows standard on'yomi. The term became more common during the COVID-19 pandemic.