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But influenza isn't a coronavirus.
Oh really? Never would have thought!
(If you think my understanding of this is so limited, if I were you I simply wouldn't have replied.)
There has never been an effective vaccine against any human coronoavirus to date.
Yes, because we've had no reason to do it - who's going to work on that when they could work on Cancer?
Now this thing is bigger than Cancer. Cancer, AIDS, Dementia, Malaria, Heart Disease, Alzheimers.... everything.
That's not a great precedent.
It's better than a complete absence of any large scale effective vaccine I think.
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Yes, because we've had no reason to do it - who's going to work on that when they could work on Cancer?
I'm not sure that's necessarily true. 4 common human coronaviruses form part of the collection of viruses we collectively refer to as the common cold. Considerable amounts of time and effort have been spent trying to develop vaccines. None have succeeded. Considerable efforts were also made to finding a SARS vaccine. There is none.
Maybe this time it'll be different, but the assumption that we'll be able to find a vaccine against SARS2 because we've been able to develop vaccines for other entirely different types of virus is quite a leap of faith. And as we know from HIV, throwing vast amounts and money and time at a problem doesn't necessarily result in an effective vaccine.
But influenza isn't a coronavirus. There has never been an effective vaccine against any human coronoavirus to date. That's not a great precedent.