The lines in front of the COVID-19 testing center near my home in New York City wind around the block. New York and London are seeing spikes in positive cases and the omicron variant of the novel coronavirus is spreading around the world, putting hospitals near capacity, prompting countries to tighten their borders and disrupting travel plans right before the holiday season. It seems like we've been here before. It's beginning to look like 2020 all over again.