Is that the lockdown and regular testing hasn t yet stopped the virus from spreading. the city reported more than 20 thousand new cases on sunday. and that could be because of low vaccination rates. here s our correspondent there, stephen mcdonell. after more than 400,000 infections in shanghai in this outbreak, china has dropped the ball when it comes to booster shots. when we consider the number of, say, over the age of 60, in shanghai who have had two shots, well, that s over 60%. it could be higher, but not too bad. those over 60 who have had the booster shot, it is only 38%, it is too low if you want to be really easing off restrictions in those cities. as we have learnt throughout this pandemic, lockdowns have a critical impact on the economy. and china is seeing that again in a way not seen there for two years. retail sales fell by 3.5% in march compared to a year earlier, that was the first decline