In Dave’s story there are several potential disease transmission methods that should have been eliminated in order to ensure a safe environment. Dave has physical contact with the other residents, which can lead to infectious diseases spreading such as COVID-19 or influenza. To reduce this risk, implement measures like wearing gloves and maintaining a distance from others.
Secondly, because of the closeness of the individuals living in these types of situations it is more likely that airborne particles will carry bacteria or viruses. You can avoid this by cleaning surfaces on a regular basis and checking ventilation systems. Food preparation should always be handled with care as contamination can lead to food poisoning. Proper hygiene during meals should also be observed, including washing your hands both before and after you eat.
In general, these risks exist in many living arrangements in communal areas and need to be dealt with accordingly to keep everyone healthy.