The specter of another global crisis, along with the potential emergence of a deadlier foe, is pushing disease trackers to begin preparations now, even as Covid continues to rage in some regions. Researchers and governments want to smash vaccine development records set during this pandemic, harnessing technologies such as messenger RNA, and build a stronger system that can respond swiftly to stop the next outbreaks from exploding when they do occur.

However, while vaccination reduces the risk of severe disease, it does not eliminate it. With data showing that Delta is significantly more transmissible than Alpha, it is just as important as ever to follow public health advice, which has not changed. Get vaccinated, work from home where you can and remember hands, face, space, fresh air’ at all times. These measures work, and they save lives, Dr Jenny Harries, Chief Executive of the UK Health Security Agency. said.