New Delhi, May 7 -- Five years ago, COVID was all we could think about. Today, we'd rather forget about lockdowns, testing queues and social distancing. But the virus that sparked the pandemic, SARS-CoV-2, is still circulating.

Most people who get COVID today will experience only a mild illness. But some people are still at risk of severe illness and are more likely to be hospitalised with COVID. This includes older people, those who are immunocompromised by conditions such as cancer and people with other health conditions such as diabetes.

Outcomes also tend to be more severe in those who experience social inequities such as homelessness. In the United Kingdom, people living in the 20 per cent most deprived areas have double chance of...