Random Covid-19 antibody testing of 1,612 people at various public places in Guadalajara and Puerto Vallarta during the “Buen Fin” shopping blitz registered a positivity rate of 13 percent and will help provide a clearer picture of the spread of the disease in Jalisco, health authorities say,
A positive antibody test means a person has likely been infected with SARS-CoV-2 at some point in the past. While the results cannot contribute to the analysis and strategy regarding active Covid-19 cases, they can reveal useful data on how many undiagnosed cases there may have been in a community.
Up until November 16, the Jalisco Health Department (SSJ) statewide “Radar” testing program (only reporting PCR tests), had registered 103,888 positive Covid-19 cases from 313,634 tests performed in the state – a positivity rate of 33 percent, which is high (the rate in the United States is 6.8 percent) because of the low testing numbers here and the fact that the figures only represent a narrow, selective band of the population who have mostly experienced some kind of symptom, and do not include many asymptomatic carriers of the virus.
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