The stark data behind the CDC's reversal on masks. Plus: Why we struggle to assess risks.
This week: Why the CDC reversed course on masks; disturbing new numbers in the U.S.; the science behind why we have trouble weighing risks; the threat of breakthrough infections. | |
| PHOTOGRAPH BY FRANCINE ORR, LOS ANGELES TIMES VIA GETTY IMAGES | | Behind the CDC's reversal on masks, a stark warning | The virus had more than a year to stumble upon mutations that let it more effectively enter human cells and evade our immune systems. Now, we have Delta: roughly twice as transmissible as earlier strains of the virus, and possibly as contagious as chickenpox. | | | |
| NG STAFF | | | |
| PHOTOGRAPH BY SCOTT CAMAZINE, SCIENCE SOURCE | | | |
| PHOTOGRAPH BY GENARO MOLINA, LOS ANGELES TIMES, GETTY IMAGES | | | |
| PHOTOGRAPH BY MUHAMMAD FADLI | | | |
| PHOTOGRAPH BY MARTIN OEGGERLI | | | | | TY O'NEIL, SOPA IMAGES/SIPA/AP IMAGES | | | |
| PHOTOGRAPH BY ALESSANDRO GANDOLFI, PARALLELOZERO/INSITITUTE | | | | | PHOTOGRAPH BY STEFAN WERMUTH, BLOOMBERG VIA GETTY IMAGES | | | |
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