an old brick wall with the words on each brick. the inscription stayhome is highlighted in white

2019 2019ncov 2020 abstract area asia background bacterial banner biochemical biohazard brick china chinese concept contagious corona coronavirus covid covid19 cowid19 danger disease due each epidemic flu global hazard health highlighted home illustration infection infectious inscription inscriptions ncp novel old organization pandemic pneumonia pulmonary quarantine related retrovirus stay stayhome text vaccination virology virus wall warning white who words world wuhan