| Comment | While there is no guarantee a single vaccine will work, we could have multiple candidate vaccines under development in parallel. I was reading an article about this that was discussing the reason this doesn't normally happen is that vaccine development is immensely expensive and only the 'successful' developer makes money out of their product, so there is little investment in multiple versions of the same potential vaccine. CV19 is so significant though, that an intergovernmental body would surely fund a huge number of candidate vaccines even if all but one of them turn out to be useless. |
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