New blood study finds that only about 10% of Americans are immune to COVID-19, researchers say

23354 Description: Caption: Transmission electron microscopic image of an isolate from the first U.S. case of COVID-19, formerly known as 2019-nCoV. The spherical viral particles, colorized blue, contain cross-sections through the viral genome, seen as black dots. High Resolution: Click here for hi-resolution image (12.06 MB) Content Providers(s): CDC/ Hannah A Bullock; Azaibi Tamin Creation Date: 2020 Photo Credit: Hannah A Bullock; Azaibi Tamin

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