Photo taken on Aug. 1, 2020 shows the X-ray room of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows an area for medical staff at a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Staff members work at a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong on Aug. 1, 2020. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

A staff member demonstrates protective measures at the personal protective equipment (PPE) gown up area of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong on Aug. 1, 2020. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Screens are seen showing the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong on Aug. 1, 2020. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)

Photo taken on Aug. 1, 2020 shows the interior of a makeshift hospital for COVID-19 patients at the AsiaWorld-Expo in south China's Hong Kong. A makeshift hospital at the AsiaWorld-Expo, a venue near the Hong Kong International Airport, began receiving COVID-19 patients with mild symptoms since Saturday afternoon, Hong Kong's Hospital Authority (HA) said. (Xinhua/Wu Xiaochu)