Coronavirus (Source: CDC) It has been a while since I have written anything on this blog, and I missed that. But sometimes you need to take care of things that simply can’t wait. For example, taking some time off to take care of your sick father. Under those circumstances, even when you are not actually looking after someone you love in person, it’s the constant worry that gets you. At the very least, that worry got me, and that’s something that has been in my mind all the time for the last few months. But now that I don’t have to worry about that anymore, I can focus on this blog again. I hope to write regularly from now on. There is something else that most of us are worried about now though: coronavirus disease 2019 or COVID19 (to learn about the most recent developments on COVID19, please visit CDC’s website ). I intend to write a few essays on viruses, and this would be the first one. Here, I am going to focus on a question that might seem strange without any biology backgro...