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Half an hour after arriving at Wayne's house, I watch him swallow three anti-nausea tablets, designed to minimise the risk of him vomiting the lethal medication he plans to take shortly.

“People might lose track of where they are, blurred vision, loss of balance. There’s nausea, chest tightness, headache, vomiting and impaired memory.”

Dengue, another virus that can be spread by mosquitoes, can cause high fever, body aches, vomiting and a rash.

His run to the US Open semi-finals captured the attention of the wider British public, although his nerves were illustrated by vomiting on court in a defeat by eventual champion Jannik Sinner.

I did vomit before my final audition which was in front of people — the director and the producers — and I couldn't believe that I was having to do a live audition.