Vaccines will always be our best weapon against Covid – here’s how to deploy them

Since the pandemic began almost two years ago, the monster that is Covid-19 has visited every corner of Earth, killing more than 5.5 million people. But we have fought back with astounding speed and vigour, and the situation today is very different from that in early 2020. Ten billion vaccine doses will have been administered worldwide by early February. The Covax scheme has delivered 1bn vaccines to lower-income countries. As a result, global daily deaths from the virus are at their lowest point in more than a year. So, is the monster slain? No. Covid-19 will not just disappear. Only one human infectious disease has been eradicated from the planet – smallpox – and that took nearly 200 years. Polio is near to extinction, but it has taken a 70-year campaign.