The epidemiologic goals are to stop the spread of infection and disease within a population or between populations. What is important to realize is that you cannot fully extrapolate what happens in one country applies to another country and even within the same pathogen causing an outbreak at one time period does not necessarily apply to another timeframe. In influenza virus, asymptomatic children can spread influenza to their grandparents inadvertently. However, Influenza is a mutating negative-sense RNA virus, which cannot be extrapolated to act the same way as a positive sense RNA Coronavirus. In addition, the Coronavirus is an enveloped virus which does not last long outside its host and soap and water will dissolve the lipid bilayer of the envelope surrounding the virion (protein coat with RNA genetic material inside). non-enveloped viruses survive outside their host much longer but that is not the case with Coronavirus (non-enveloped virus). As a previous medical director of a nursing home, there is a higher risk to this elderly, frail patients often on a lot of medications and poor sunlight exposure. Wearing masks and changing ventilation systems and initial controlling of visitors will help, in addition to countering the nutritional deficits of the medications and improving immune health is a positive proactive strategy to help those who will likely least respond to vaccines. It is important to realize vaccines require competent immune systems to be effective, which prevent disease. Once you have an intracellular infection the vaccines (humoral adaptive immunity) do little as the body's cellular adaptive immunity takes over. Vaccines do not kill viruses. Viruses are not living organisms so you can not kill something that is not living. You can, however, prevent the life cycle of a virus from infecting a host cell and interfere with replication and re-infection within the body. Finally, sunlight, humidity and infra-red lighting is absolutely beneficial at helping the highest risk patients not succumb to infection including influenza and Coronavirus. In labs that work on deadly viruses that have no vaccine-like Ebolavirus, the lab techs/ researchers where positive pressure suits and the entrance to the lab has negative pressure rooms, infra-red lighting and showers with soap; everything you could put In a nursing home or personal home. If you really want to be brave (a little more expense and not for everybody) add an acold immersion dip tank to raise your endogenous epinephrine levels next to your infra-red sauna.Anyway, quit telling college students to get off the beaches (protective sunlight, ocean breezes and high humidity) and go to their dorm rooms with low humidity in closed spaces. The advice about virus(influenza or Coronavirus) protection is backward. Moreover, send the children back to school, proms and graduations.