Most people know the importance of a functional immune system during these winter months, but one expert researched the issue further.

Dr Roderick Mulgan's book, Build Your Immunity for Life: Diet and Lifestyle Choices to Protect against Infection examines the best tips to gain maximum immunity to protect yourself.

He says the event of the Covid-19 pandemic inspired his research, as people were suddenly more focused on immunity.

"Hopefully, though the worst is behind us, people have a new awareness of how important it is. Because of course, the pandemic was just one event where we're constantly at risk of infections." 

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