Ahmed Nasser, a 22-year-old student wearing clown clothes, sprays disinfectant to a boy's hands to raise people's awareness on COVID-19 in Cairo, Egypt, on April 9, 2020. (Xinhua/Ahmed Gomaa)

Ahmed Nasser, a 22-year-old student wearing clown clothes, sprays disinfectant to a girl's hands to raise people's awareness on COVID-19 in Cairo, Egypt, on April 9, 2020. (Xinhua/Ahmed Gomaa)

Ahmed Nasser, a 22-year-old student wearing clown clothes, shows a facial mask to raise people's awareness on COVID-19 in Cairo, Egypt, on April 9, 2020. (Xinhua/Ahmed Gomaa)