China expands anal swab coronavirus tests, saying it's more accurate than throat method<br/><a href="https://www.washingtonpost.com/world/asia_pacific/anal-swab-china-coronavirus/2021/01/27/cc284f56-6054-11eb-a177-7765f29a9524_story.html" rel="noreferrer noopener" target="_blank">washingtonpost.com</a>