What type of vaccine is Oxford-AstraZeneca?

What type of vaccine do Pfizer-BioNTech and Moderna use?

What type of vaccine are Novavax and Chinese Academy of Sciences using?

What type of vaccine are Sinovac, Bharat Biotech and Sinopharm using?

The Pfizer-BioNTech vaccine has which characteristics?

The Oxford-AstraZeneca vaccine has which characteristics?

viral vector

'whole' virus

What are the 4 approaches to vaccination that are most advanced?