A member of a volunteer group named "Mask Panda Action Team" hands out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

Members of a volunteer group named "Mask Panda Action Team" pose for photos with local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

A member (R) of a volunteer group named "Mask Panda Action Team" hands out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

Members of a volunteer group named "Mask Panda Action Team" hand out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

Labels expressing support and gratitude are seen on clothes of a member of a volunteer group named "Mask Panda Action Team" in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

Members of a volunteer group named "Mask Panda Action Team" hand out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

Members of a volunteer group named "Mask Panda Action Team" hand out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)

A member of a volunteer group named "Mask Panda Action Team" hands out masks to local people in Tokyo, Japan, Feb. 29, 2020. Members of the "Mask Panda Action Team", a volunteer group initiated by local Chinese community and later joined by more people in Japan, distributed free masks to local people on Saturday to help with the prevention of the novel coronavirus disease. (Xinhua/Du Xiaoyi)