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People ride a subway with social distancing signs on a floor inside a train as the spread of the coronavirus disease (COVID-19) continues, in Rome, Italy, April 28, 2020. (Photo/Agencies)
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People stand on social distancing signs on a train as the spread of the coronavirus disease (COVID-19) continues, in Rome, Italy, April 28, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/04/29/7fa3d11f80254b0e895bceffb5cbd824.jpg)
People keep social distance while riding a subway train as the spread of the coronavirus disease (COVID-19) continues, in Rome, Italy, April 28, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/04/29/30e9ec97d7fd45409764ea048569a0f9.jpg)
A man sitting on a social distancing sign as he waits for a train at a subway station as the spread of the coronavirus disease (COVID-19) continues, in Rome, Italy, April 28, 2020. (Photo/Agencies)