COVID-19

Short for 新型コロナウイルス (shingata korona uirusu, “novel coronavirus”). / Short for 新型コロナウイルス感染症 (shingata korona uirusu kansenshō, “novel coronavirus disease”).

The three 密 (mitsu)s that should be avoided in order to avoid infection during the 2020 coronavirus pandemic, promoted by the Japanese government, translatable as "the three C's": 密(みっ)閉(ぺい) (mippei, “closed spaces”), 密(みっ)集(しゅう) (misshū, “crowded spaces”), 密(みっ)接(せつ) (missetsu, “close-contact settings”).

(virology) coronavirus

defend (against); prevent (something)

to avoid

Alternative form of 三つ (mittsu)

new style, new model, novel type

to avoid

three things [small or without a counter category]