How Covid-19's symptoms have changed with each new variant

With a new variant of the Sars-CoV-2 virus causing a spike in cases, it is demonstrating just how much the disease has changed since the pandemic began – and what happened to "Covid toe".

"For almost four years, I've managed to dodge Covid-19," TV broadcaster Mehdi Hasan tweeted a fortnight ago. "But it finally got me. At the end of 2023."

Hasan added that his symptoms were thankfully mild, but he is just one of many people reporting their first ever positive test for the virus responsible for the pandemic, Sars-CoV-2,...