T-cell Covid immunity 'present in adults six months after first infection'

Cellular (T-cell) immunity against the virus that causes Covid-19 is likely to be present within most adults six months after primary infection, with levels considerably higher in patients with symptoms, a study suggests.

The data offers another piece of the puzzle that could be key to understanding whether previous Sars-CoV-2 infections – the virus behind Covid-19 – can prevent reinfection, and if so, for how long.

The study, led by the UK coronavirus immunology consortium, evaluated 100 non-hospitalised healthcare workers in March and April after antibody responses were detected in them. It is yet to be peer-reviewed.

It is the first study to offer data on T-cell levels six months after infection in people with mild or asymptomatic disease that is likely to represent the majority of infections, the authors say.

The results of the study are likely to be viewed positively, after previous studies suggested antibody levels can decline within the first few months post-infection.

https://www.theguardian.com/world/2020/nov/02/t-cell-covid-immunity-present-in-adults-six-months-after-first-infection

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