I received the news today that someone in my apartment has got infected with Covid-19. They live just a few floors down from me.  I'm absolutely terrified and I suddenly began to get panic attacks.  I just don't know what to do. Of course I'm locked up in my house. But the fear is overbearing.  What precautions must I take to not get Covid-19 and how should I deal with this situation?  I feel psychologically helpless.    Any advice is appreciated.