infection

Our bodies naturally fight viruses and infection, but we can also give it a helping hand with the right medication.

It is rare for food contaminated by listeria, a bacterium, to cause a very serious infection, known as listeriosis.

Sian Jones, 72, has suffered from recurrent "debilitating" urinary tract infections for more than 50 years, and has lost two premature babies as a result.

But recent genetic changes the virus has acquired may make infections more likely.

Grace, from Wales, said she struggled to get medical help for her newborn son for multiple ear infections during the pandemic.