By February this year, one thing was clear – the US was experiencing one of its worst flu seasons in decades.

According to a preliminary assessment from the US Centres for Disease Control (CDC), up to 99,000 deaths were linked to the 2024/25 flu season, which was one of the deadliest seasons on record for children.

Donald Trump appointed anti-vaccine activist Robert F. Kennedy Jnr to run the US health system. It has been a double-blow for CSL which has lost more than $50 billion in market value since the start of the year. Credit: Bloomberg

It was a brutal lesson for a country dogged by growing mistrust of vaccinations - ranging from scepticism to outright anti-vaxxer rage - and post-pandemic vaccine fatigue. But for ASX-listed Australian pharmaceuticals giant CSL, the signs were pr

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