Coronavirus live news: Hong Kong man’s second Covid-19 infection gives rise to immunity concerns

1.55pm EDT 13:55 That’s all from me today. Jessica Murray will keep the blog warm throughout the evening. Here is a summary of what has been a fairly quiet day on the blog: A Hong Kong man has caught Covid again four months after he recovered from his first bout, in what medics says is the first confirmed case of human re-infection. Usain Bolt may or may not have Covid — but he is definitely self-isolating. There is “very low …

Case of man reinfected with coronavirus stokes immunity fears

A young man has been diagnosed with coronavirus more than four months after he recovered from a first episode of the disease, suggesting that immunity to the virus can be short-lived and raising more questions about vaccines against Covid-19. The case in Hong Kong is the first lab-confirmed reinfection. Genetic sequencing by scientists at the University of Hong Kong established that the second episode, in an otherwise healthy young man, was caused by a slightly different strain. Researchers had hoped …

Why do Covid fatalities remain low when infection numbers are rising?

While some scientists believe the virus has become less deadly, others look at the factors that suggest otherwise Some researchers believe that social distancing has led to smaller amounts of the virus being transmitted. Photograph: Bradley Collyer/PA   Are Covid-19 death rates decreasing? Most statistics indicate that although cases of Covid-19 are rising in many parts of Europe and the United States, the number of deaths and cases of severe complications remain relatively low. For example, patients on ventilators have …