KOLKATA: The second Covid 'sentinel survey' in Bengal, conducted between May 18 and 20 on 10,975 samples, has thrown up a positivity of 0.17%, with just 19 positives, a shade lower than that of the first survey, which had been 0.18%. In Kolkata, RG Kar tested 235 random samples, all of which tested negative. The nearest-to-Kolkata positive was detected from Howrah district hospital. Three samples each - the highest of all - tested positive at Nandigram and Basirhat hospitals. In 16 Bengal health districts, not a single sample tested positive. The samples had all been collected from asymptomatic patients who had turned up in hospitals for other treatments.
The second sentinel survey by Bengal government from May 18-20 has thrown up Covid positivity rate of 0.17% which is slightly lower than the 0.18% in the first survey conducted between April 27 and 29.
