Testing for COVID-19 has plummeted globally, making it tougher for scientists to track the course of the pandemic and spot worrisome viral mutants as they emerge and spread.
Pandemic Gets Tougher to Track as COVID Testing Plunges
Testing for COVID-19 has plummeted globally, making it tougher for scientists to track the course of the pandemic and spot worrisome viral mutants as they emerge and spread.
