Last year many of us thought that the zombies had gone - or at least we hoped so. We should have known better. Classic zombie movies should have taught us that you can never kill zombies. They just keep coming. You can try to burn them, lob grenades at them, cut off their heads, but they always keep coming. We even tried the 'kill the vampire' move - stake through the heart. Nothing worked. Such were the COVID zombies - for three years we did all the right things to ward them off. Some of us became hermits, locked ourselves up in our homes, limited our shopping, avoided gatherings and visitors. We dutifully took the required shots and boosters and wore our masks. Even then, despite all our precautions, the COVID zombies caught up with many of us. Most of us survived with fairly mild symptoms. Then we went around telling others, "Oh, it wasn't so bad." Doing so, we ignored all evidence to the contrary - the fact that some did no...