Healthcare workers waving as first responders parade past Ascension St. John Hospital, Detroit, Michigan, USA, in their honour during the coronavirus outbreak of 2019-20. The new coronavirus SARS-CoV-2 causes a respiratory infection (Covid-19) that can lead to fatal pneumonia. The virus has spread worldwide, infecting millions of people and causing hundreds of thousands of deaths. Social restrictions and infection control measures were put in place to slow the spread of the virus and ease the burden on healthcare systems. Photographed on 4th May 2020.