It might surprise you that our immune systems have a memory, and it is crucial in our battle against diseases like COVID-19. The secret of improving this memory might be living inside you already. A research team from CUHK’s Faculty of Medicine has discovered the critical role that certain gut bacteria can play in lengthening the duration of immune responses to COVID-19 vaccines. The problem is, not everyone has them. As a result, they’ve come up with a supplement containing the beneficial bacteria, and demonstrated how effective it can be in boosting immunity. Now they’re looking at what our gut microbiome can do to protect us from other diseases.

The Microbiota I-Centre of CUHK has identified distinct gut microbiome profiles that can characterise “long COVID”. This is the world’s first study to demonstrate gut microbiota as a key determinant of long COVID. These distinct gut microbial signatures can be used as a diagnostic tool and to guide therapy.

People who have recovered from a COVID-19 infection may suffer from poor memory, hair loss, difficulty in sleeping and other long-term consequences, which are commonly known as “long COVID”. CU Medicine has found that patients with long COVID have a less diverse gut microbiome, indicating that gut microbiome composition may be linked to the risk of developing long COVID, while gut microbiota modulation could facilitate timely recovery and reduce the burden of post-acute COVID-19 syndrome.