LOS ANGELES (Reuters) – Some 4.1% of adults tested positive for coronavirus antibodies in a study of Los Angeles County residents, health officials said on Monday, suggesting the rate of infection may be 40 times higher than the number of confirmed cases.
The serology tests, conducted by University of Southern California researchers on 863 people indicate the death rate from the pandemic could be lower than previously thought but also that the respiratory illness may be being spread more widely by people who show no symptoms.
“We haven’t known the true extent of COVID-19 infections in our community because we have only tested people with symptoms and the availability of tests has been limited,” Neeraj Sood, a professor of public policy at USC and lead researcher on the study.
“The estimates also suggest that we might have to recalibrate disease prediction models and rethink public health strategies,” Sood said.