One in four or five tests for coronavirus infection (COVID-19) done with the use of the polymerase chain reaction (PCR) method could give false negative results.

The press service of Ukraine's Health Ministry said on Facebook that as a rule, oropharyngeal (throat) swabs are collected for PCR testing, and results could be false if the virus is concentrated in the lower respiratory tract.

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The accuracy of the results is also dependent on conditions for the collection and transportation of biological materials to the laboratory.

As UNIAN reported earlier, there were 64,849 laboratory-confirmed cases of COVID-19 in Ukraine as of the morning of July 26. Of them, 920 were recorded in the past day. The death toll by that date was 1,605.