Coronavirus jab will be reserved for high-risk groups
British Government told UK jab could ease symptoms instead of giving immunity
Men and women of all ages still report symptoms months after receiving the all-clear
Patients with Covid-19 often report gastrointestinal symptoms and web search data can help identify hot spots four weeks earlier
Attempts to tackle climate change could be harmful for the environment, researchers warn
Spacecraft's six Delta-V thrusters fired for the first time to adjust path to Mars
Moscow officials hope their vaccine will gain approval for widespread use in the next two weeks