他の調べ物してて、寄り道して拾った
Common human coronaviruses, including types 229E, NL63, OC43, and HKU1, usually cause mild to moderate upper-respiratory tract illnesses, like the common cold. Most people get infected with one or more of these viruses at some point in their lives. This information applies to common human coronaviruses and should not be confused with coronavirus disease 2019 (formerly referred to as 2019 Novel Coronavirus)...
新型が流行る前の日本国内での旧型4種別発生期間パターン↓
いや、さ、カルト日本黒サブロめ!教団員らしいのが「新型ウイルスは存在しないから旧型なんてなおさら無いぃ!存在確認すら出来てないぃ!PCR検査は全部詐欺ぃぃい!」とか陰謀論飛ばしてるの見掛けたんで😟