[https://abcnews.go.com/Health/us-17-million-undiagnosed-covid-19-cases-early/story?id=78447577&cid=clicksource_4380645_8_heads_posts_card_hed](https://abcnews.go.com/Health/us-17-million-undiagnosed-covid-19-cases-early/story?id=78447577&cid=clicksource_4380645_8_heads_posts_card_hed)