Spread of Covid baffles locked-down Shanghai residents

Veronica thought she did everything right by sticking to all of the Covid-19 lockdown rules in the Chinese city of Shanghai.

After the entire city was shut down on April 1, her family of four scrupulously followed government orders to stay at home, stepping out the front door only for mandatory PCR testing.

When curbs were relaxed slightly in mid-April, letting residents....