Immunity debt: does it really exist?

Some claim the rise in winter infections has been caused by the reduction of seasonal bugs during lockdowns. But experts are sceptical about these oversimplified explanationsThe deaths of at least 190 people, including 30 children, from the invasive bacterial infection group A streptococcus, or strep A, are the most extreme consequences of a wave of winter infections that have seemingly left most of the country coughing and sneezing. The parlous state of the nation’s health has prompted su