![](http://www.ecns.cn/hd/2020/04/01/2287562519df4b97a9b34048f680646f.jpg)
Police officers direct the traffic outside a drive-through COVID-19 test site in Vancouver, Canada, March 31, 2020. Several satellite sites around the cities are operating 7-day a week offering drive-through COVID-19 test. (Photo by Liang Sen/Xinhua)
![](http://www.ecns.cn/hd/2020/04/01/a843f5e62aa046c7ba7ccf292184c6ea.jpg)
A police officer directs the traffic outside a drive-through COVID-19 test site in Vancouver, Canada, March 31, 2020. Several satellite sites around the cities are operating 7-day a week offering drive-through COVID-19 test. (Photo by Liang Sen/Xinhua)
![](http://www.ecns.cn/hd/2020/04/01/a72de8f570b247d7bc88180972253e45.jpg)
A car leaves a drive-through COVID-19 test site for health care workers in Vancouver, Canada, March 31, 2020. Several satellite sites around the cities are operating 7-day a week offering drive-through COVID-19 test. (Photo by Liang Sen/Xinhua)
![](http://www.ecns.cn/hd/2020/04/01/8ff41df430b34f3bbbc407a54b6ad0b4.jpg)
A sign showing the direction of a drive-through COVID-19 test site for health care workers is seen in Vancouver, Canada, March 31, 2020. Several satellite sites around the cities are operating 7-day a week offering drive-through COVID-19 test. (Photo by Liang Sen/Xinhua)