How do vaccines work, and how bad is Delta?

Comedians Nazeem Hussain and Cal Wilson  along with Doctor Kate Gregorevic and Professor of Immunology Sammy Bedoui discuss questions around vaccines and COVID. 

· How is Delta different, and how bad is it?
· Are the vaccines still in trial phase?
· Do we know if there will be long term side affects?
· Can’t my natural immunity fight the virus?
· Will herd immunity protect me?
· Do I still need to wash my hands?
· What do cows have to do with vaccination?

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