Wearing a mask to curb the spread of the new coronavirus, a resident walks on a street in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Wearing masks to curb the spread of the new coronavirus, students walk to the only open school in Campohermoso, Colombia, Thursday, March 18, 2021. Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago, with the student body at the school rotating half the students into their classrooms while the other attends via the internet. (AP Photo/Fernando Vergara)

Wearing masks to curb the spread of the new coronavirus, students attend class in the one open school in Campohermoso, Colombia, Thursday, March 18, 2021. Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago, with the student body at the school rotating half the students into their classrooms while the other attends via the internet. (AP Photo/Fernando Vergara)

Wearing masks to curb the spread of the new coronavirus, Mayor Jaime Rodriguez, left, talks with a resident in Campohermoso, Colombia, Thursday, March 18, 2021. Rodriguez has been the only town resident to contract COVID-19 when he travelled to the Capital of Colombia, Bogota, but he had to stay there until he recovered to avoid spreading the disease in his home town. (AP Photo/Fernando Vergara)

Wearing a mask to curb the spread of the new coronavirus, a man sits on his front porch in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Radio jockey Cristian Sanchez makes a COVID-19 public safety announcement on the local radio station in Campohermoso, Colombia, Thursday, March 18, 2021. According to the town mayor, the key to Campohermoso being able to stay COVID free is a continuous barrage of public service announcements on the radio and public announcement systems teaching people how to stay safe during the pandemic. (AP Photo/Fernando Vergara)

A farmworker wearing a mask to curb the spread of the new coronavirus, services cocoa tree at a farm in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Men wearing masks to curb the spread of the new coronavirus, walk in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Wearing masks to curb the spread of the new coronavirus, students walk to the one open school in Campohermoso, Colombia, Thursday, March 18, 2021. Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago, with the student body at the school rotating half the students into their classrooms while the other attends via the internet. (AP Photo/Fernando Vergara)

Wearing a mask to curb the spread of the new coronavirus, a woman walks in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Residents buy groceries at the door of the supermarket after the marketplace was closed due to the new coronavirus pandemic in Campohermoso, Colombia, Thursday, March 18, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

A man wearing a mask to curb the spread of the new coronavirus attends a Mass in Campohermoso, Colombia, Thursday, March 18, 2021. Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)

Father Camilo Monrroy celebrates Mass in Campohermoso, Colombia, Thursday, March 18, 2021, amid the new coronavirus pandemic. Father Monrroy says that constant prayer by the town’s citizens, especially to St. Roque, patron saint of the parish, the sick and epidemics, has made St. Roque the patron saint of COVID in the department of Boyaca. (AP Photo/Fernando Vergara)

The town of Campohermoso is seen from above in Colombia, Wednesday, March 17, 2021. According to the Health Ministry, Campohermoso is one of two municipalities in Colombia that has not had a single case of COVID-19 since the pandemic started one year ago. (AP Photo/Fernando Vergara)