Plastic surfaces can support the COVID-19 virus for 3 to 5 days, resulting in the possibility of virus transmission. Hand washing is only one possible solution. You need to notify your users, and move to contactless technology.
A lot of people think PKI using SmartCards and Certificate Authorities is the only way to go. It works, but it is complex and requires significant IT resources to maintain. What if there was an out-of-the-box solution that could use your existing building-access cards? There is!