India, July 13 -- In our day to day lives, we touch a lot of surfaces which might be infected by microbes and bacteria. And there are certain contact points which are difficult to avoid. For instance, can you guess the number of fingers which would have touched that doorbell you just rang? Can you guess how many people hold the doorknob you just turned? Or to be precise, was it used by someone who was infected with the novel Coronavirus? Well, a contaminated doorknob can infect a household or an entire office floor. Since a drastic change in the way doors are designed is not possible immediately, many are finding new and easy ways such as using our sleeve, elbow or forearm to move the handle. But the question is, for how long can we adjus...