Save My Grandparents (Win/Mac)

In the near future, the entire planet has been strucken with a deadly virus that has caused a world wide pandemic. The virus is called COVID-19.  This spreading virus is infecting and killing many people throughout the world. The elderly are the most vulnerable to the new virus. Of those vulnerable elderly is your two grandparents.  You are the only person that can protect your grandparents from the deadly COVID-19.