The world has been dealing with Covid-19 for over 2 years and although EA won't introduce Covid-19 to TS4, why haven't the modders done so? It seems to me that they've been able to do anything else they wanted. A mod like that could randomly affect an Elder since they were more susceptible to contracting the virus in the real world. Or it could affect a young adult and they could be carriers to infect other sims if they don't wear a mask in public for instance. Sims could go to a HSP to get vaccinated and have proof when asked if they have been vaccinated by other in-game sims. Sims could chose whether to wear a mask or get vaccinated. All in all a little more realism wouldn't hurt a simulation that seems to simulate everything else.