COVID-19 has only been around for a few months, so at this point scientists don’t know that much about it. But more is being learned every day. We now know, for example, it can live on surfaces for up to nine days and survives in the air for a few hours. We also now know that the virus particles are shed through saliva and fluids coughed up from the lungs. And that the virus can also be shed from our faeces.It’s easy for an infected person to spread the virus particles through coughing, touching other people or leaving the virus on surfaces. Undoubtedly, hand-washing after being in public spaces is key to reduce the spread of COVID-19. But what should we be doing in our homes to eliminate it?Two recent studies have investigated how long coronaviruses survive on different surfaces. The research looked at a number of different viruses including SARS-CoV-2 – the coronavirus that has caused COVID-19. And it found that the survival times varied according to the type of surface.The virus survived for longest on stainless steel and plastic – for up to nine days. The shortest survival times of one day was for paper and cardboard.