Scientists are developing a range of second-generation Covid vaccines aimed at expanding protection against the disease.
Candidates include one version that could provide immune defence against many different virus variants, while other researchers are investigating vaccines that would generate responses aimed specifically at blocking transmission of the disease.
Other projects include research into the creation of multiple vaccines that could each tackle different virus strains but would be administered as a single jab in a manner similar to annual flu jabs, which currently combine four vaccines against different strains of the influenza virus.
Candidates include one version that could provide immune defence against many different virus variants, while other researchers are investigating vaccines that would generate responses aimed specifically at blocking transmission of the disease.
Other projects include research into the creation of multiple vaccines that could each tackle different virus strains but would be administered as a single jab in a manner similar to annual flu jabs, which currently combine four vaccines against different strains of the influenza virus.