coronavirus cases. These are some of the countries across the world which have had to reintroduce restrictions in regions due to a spike in COVID-19 cases.The United States, which has been worst hit by coronavirus cases, has had to put on the brakes and bring back lockdown restrictions in several states after the reopening of bars and restaurants when the virus was still spreading.The US has the world's highest number of coronavirus deaths and infections with more than 43,000 new cases in 24 hours on Saturday, according to figures from Johns Hopkins University.Get the latest updates from across Greater Manchester direct to your inbox with the free MEN newsletterYou can sign up very simply by following the instructions hereOfficials in.