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Context: According to the latest list of the World Health Organisation, at least 165 vaccines for novel Corona virus were being developed across the world. Those that are listed have all entered at least the pre-clinical trials stage.
Why are so many vaccines being developed?
Vaccine development has a very low success rate
The world needs multiple Corona virus vaccines
There is another reason why multiple vaccines would be needed.
New technologies being tried
Fund availability
It is a high-risk game, but can turn out to be extremely rewarding for those who succeed. Many research groups are in this for the learning experience as well.
Reference:
https://indianexpress.com/article/explained/covid-19-vaccine-updates-6536653/
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