The BBC has spoken to a hospital manager and had access to correspondence sent to relatives of patients who’ve died during the Omicron outbreak that is sweeping through China’s biggest city.

We’ve also had access to official documents that suggest at least 27 patients from a single hospital, who weren’t vaccinated, have died from what it called “underlying health problems”…

We’ve contacted several other care homes or hospitals for the elderly since then, after social media postings suggested there was evidence of widespread infections among hundreds of patients in 12 other facilities here.

One relative of a patient at another care home in Shanghai has told us that doctors and caregivers working there had informed her that everyone in the facility had tested positive. It has capacity for around 300 patients.