Pfizer/BioNTech vaccine is effective at preventing severe disease in people who have diabetes and heart condition
The country's vaccination campaign faces a battle against vaccine scepticism that predates the pandemic
Paralysed rodents that received the treatment started walking after two to three weeks
Microscopic organisms living in our intestines may influence the severity of Covid-19 and the body's immune response to it
Strain is said to be up to 70% more transmissible than the previously dominant strain in UK