Why Didn’t the U.S. Detect Omicron Cases Sooner? Genomic surveillance has improved enormously in recent months, but the system has built-in delays, and blind spots remain. https://ift.tt/2XidLiy https://nyti.ms/3eyQv5F

Genomic surveillance has improved enormously in recent months, but the system has built-in delays, and blind spots remain.

from NYT > Top Stories https://nyti.ms/3rE52qe
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