Pfizer has said vaccine recipients will need a third dose of its jab, which will increase protection against Covid-19 and its Delta strain.A historic former Southbank warehouse would be transformed into a new sky high Melbourne hotel.New research has found that legalising cannabis would prompt an extra 880,000 Australians over the age of 14 to try it for the first time.  Carrying excess weight, particularly around your stomach, puts you at higher risk of a heart attack or stroke – but fewer people are aware of the link.For updates and breaking news throughout the day take out a subscription at heraldsun.com.au.