As the world still comes to grips with coronavirus’ variant, said to be highly transmissible if not deadlier than the Delta variant, that has dimmed the chances of a pandemic-free 2022, a fresh surge in US and Europe is now being blamed on a combination of the two. Delmicron, a combination of the virus’ Delta and Omicron variants, can transmit even faster. While Covid-19 infections only involve a single mutant strain, two can strike simultaneously in extremely rare cases. Omicron, accounting for 73% of fresh infections last week, has become the dominant variant in the US, the Associated Press reported....