In some U.S. states, much of their progress against COVID-19 has been erased after an abysmal July that shattered records for new cases, hospitalizations or deaths.
July saw the biggest number of new cases of any month since the pandemic began, with more than 1.9 million new cases,While the number of tests performed has increased, the test positivity rate has also increased. That means a larger percentage of tests performed turn out to be positive.
Had the rise in new case numbers just been the result of increased testing, "the percent positive line could look flat or like it is decreasing over the time period when cases increased," according to Johns Hopkins University. But that's not what's happening. As of Sunday, 32 states had higher test positivity rates over the past week compared to the previous week -- suggesting ""If we see the percentage of positive tests begin to rise, it indicates insufficient testing to find infections that may be occurring," Johns Hopkins said. "Not finding these infections may mean that the virus is transmitting without intervention, which can lead to future case growth.
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