The prospect of a surge in flu cases over winter is also of concern to many people still suffering from what has been dubbed “long Covid”.
That is where coronavirus patients experience symptoms such as extreme fatigue and breathlessness long after two weeks.
Jeanne Jarvis-Gibson, a digital culture and communications student at the University of Liverpool, is one of many long Covid sufferers to join a growing online community.
The 27-year-old, from Washington in the US, used to be a keen runner – but now has to take a steroid inhaler and struggles to walk up stairs at her university halls.
She said: “I think getting the flu vaccine is vital now more than ever with the possible co-mingling of Covid and flu.
“I would think about it in the same way as wearing a mask when you go out. It’s about mutual respect for people.
“It’s more than just your own health – we have to think about everyone in our society.”
Dr Tonia Thomas, project manager at the Vaccine Knowledge Trust, which is part of the University of Oxford, said: “People think the flu is not that bad, that is even for people who are in the risk groups.
“They are leading healthy lives in terms of day-to-day living. I have spoken to patients who say they forgot they are in a risk group. It is only when they contract an infection that they realise their body responds differently to other people’s.”
The uptake rate among over-65s has remained consistent in recent years, however. Last winter, 73% took up the offer.
— bbc news