In 2010, Bill Gates famously articulated a four-part equation to reducing the world’s carbon output. Seemingly bizarrely, his first component was reducing the population — through vaccination. “The world today has 6.8 billion people. That’s headed up to about nine billion,” bemoaned Gates in his now infamous TED Talk. “Now, if we do a really great job on new vaccines, health care, reproductive health services, we could lower that by, perhaps, 10% or 15%.” Until recently, I thought this must have been a gaffe. After all, how could vaccines reduce the world’s population? Well, enter the COVID jabs – if...