A medical worker receives flowers during an activity calling for citizens showing their respect and gratitude to medical workers on the frontline fighting against the COVID-19 in Sao Paulo, Brazil, on June 18, 2020. (Photos: Xinhua/Rahel Patrasso)

A medical worker receives flowers during an activity calling for citizens showing their respect and gratitude to medical workers on the frontline fighting against the COVID-19 in Sao Paulo, Brazil, on June 18, 2020.

A medical worker receives flowers during an activity calling for citizens showing their respect and gratitude to medical workers on the frontline fighting against the COVID-19 in Sao Paulo, Brazil, on June 18, 2020.