Yemeni doctor Sami Yahya al-Hajj gives a patient free medical consultation via mobile phone in a street in Sanaa, Yemen, June 10, 2020. Yemeni doctor Sami Yahya al-Hajj drives along the streets of the capital Sanaa everyday offering free medical consultations for the poor amid the spread of coronavirus in the war-torn country. (Photo by Mohammed Mohammed/Xinhua)

Yemeni doctor Sami Yahya al-Hajj gets in his car which displays a large sticker on the rear window reading "Stop me if you need a medical consultation" in Sanaa, Yemen, June 10, 2020. Yemeni doctor Sami Yahya al-Hajj drives along the streets of the capital Sanaa everyday offering free medical consultations for the poor amid the spread of coronavirus in the war-torn country. (Photo by Mohammed Mohammed/Xinhua)

Yemeni doctor Sami Yahya al-Hajj (R) gives free medical consultation to a man in a street in Sanaa, Yemen, June 10, 2020. Yemeni doctor Sami Yahya al-Hajj drives along the streets of the capital Sanaa everyday offering free medical consultations for the poor amid the spread of coronavirus in the war-torn country. (Photo by Mohammed Mohammed/Xinhua)

A man hands over his mobile phone to Yemeni doctor Sami Yahya al-Hajj (L) to talk with his sick brother for a free medical consultation in a street in Sanaa, Yemen, June 10, 2020. Yemeni doctor Sami Yahya al-Hajj drives along the streets of the capital Sanaa everyday offering free medical consultations for the poor amid the spread of coronavirus in the war-torn country. (Photo by Mohammed Mohammed/Xinhua)

Yemeni doctor Sami Yahya al-Hajj (L) gives free medical consultation to a man in a street in Sanaa, Yemen, June 10, 2020. Yemeni doctor Sami Yahya al-Hajj drives along the streets of the capital Sanaa everyday offering free medical consultations for the poor amid the spread of coronavirus in the war-torn country. (Photo by Mohammed Mohammed/Xinhua)