Many of us will be familiar with this scenario during the pandemic. One member of the family starts to experience the telltale signs of coronavirus, gets tested, and returns a positive result.
Then, after a day or so, another person in the same household also gets struck down with the virus, followed by another. Yet despite breathing in the same air and using the same living room, kitchen, bathrooms and bedrooms, there is one lucky soul who manages to avoid catching it entirely.
But why does this happen? Richard Stanton, professor of virology at the School of Medicine at Cardiff University, said there are many potential reasons why someone might not transmit Covid-19 to a family member.
