A health worker stands by test tubes with blood at a temporary testing station where the city council is providing free tests for the coronavirus disease (COVID-19) to residents, in Torrejon de Ardoz

A health worker stands by test tubes with blood at a temporary testing station where the city council is providing free tests for the coronavirus disease (COVID-19) to residents, in Torrejon de Ardoz

A health worker stands by test tubes with blood at a temporary testing station where the city council is providing free tests for the coronavirus disease (COVID-19) to residents, in Torrejon de Ardoz, Spain, May 29, 2020. REUTERS/Susana Vera