SINGAPORE : An increasingly common mutation of the novel coronavirus found in Europe, North America and parts of Asia may be more infectious but appears less deadly, according to a prominent infectious diseases doctor.Paul Tambyah, senior consultant at the National University of Singapore and president-elect of the International Society of Infectious Diseases, said evidence suggests the proliferation of the D614G mutation in some parts of the world has coincided with a drop in death rates, suggesting it is less lethal."Maybe that's a good thing to have a virus that is more infectious but less deadly," Tambyah told Reuters.Tambyah said most viruses tend to become less virulent as they mutate."It is in the virus' interest to infect more.