A 3 percent constructive price in coronavirus testing is a important threshold for New York City. It is the level at which the mayor shut down public colleges final week. The governor says {that a} sustained 3 percent degree in the metropolis will lead to banning indoor eating, closing gyms and hair salons, and putting a 25-person cap on attendance at homes of worship at the same time as the holidays strategy.

But as vital as that 3 percent price is, it appears the metropolis and the state cannot agree on whether or not it has been reached.

That battle has performed out over the previous week, with Mayor Bill de Blasio saying 3 percent has been breached, whereas Gov. Andrew M. Cuomo stated the constructive check price was effectively beneath that. Each depends on his personal statistics, that are compiled and reported in several methods. And, it seems, the state and metropolis can also’t agree on which tests to incorporate in the calculation.

The discrepancy may be hanging: On Saturday, as an example, the metropolis stated its seven-day common was 3.11 percent. Mr. Cuomo’s workplace, nonetheless, put the metropolis’s price at greater than half a degree decrease, at 2.54 percent.

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It is the newest discordant message between two rivals that has performed out over the whole pandemic, including a degree of dysfunction and confusion to the response.

The trigger of the discrepancy lies in each the tests which might be included and the timeframe wherein statistics are reported. The state treats a brand new case as arising on the day the check consequence is available in. The metropolis dates every new case to when the pattern was offered.

So if an contaminated individual is examined on Monday and the result’s reported to the well being authorities on Wednesday, the state would come with the constructive check in Wednesday’s tally of new circumstances, whereas the metropolis would add it to Monday’s column.

Because the 3 percent threshold is predicated on a seven-day rolling common, it issues which day a brand new case is registered.

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Another issue: antigen tests, whereas typically sooner, are much less prone to detect an an infection in individuals with a low viral load. New York State consists of antigen check ends in its official metrics. The metropolis does not. It depends solely on the extra delicate check referred to as a polymerase chain response. That’s why the state — which is counting each antigen and P.C.R. tests — could have the next tally for total circumstances in New York City however a decrease share of positives.

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Source: www.nytimes.com

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