ファイザー「4回目接種必要」 オミクロン株拡大で早期化も
https://www-fnn-jp.cdn.ampproject.org/v/s/www.fnn.jp/articles/amp/282579?amp_js_v=a6&;amp_gsa=1&usqp=mq331AQKKAFQArABIIACAw%3D%3D#aoh=16397100165948&amp_ct=1639710017198&referrer=https%3A%2F%2Fwww.google.com&amp_tf=%E3%82%BD%E3%83%BC%E3%82%B9%3A%20%251%24s&ampshare=https%3A%2F%2Fwww.fnn.jp%2Farticles%2F-%2F282579