why does we can't make the vaccine of covid 19 .
As in research it said that if there would be the vaccine of SARS virus then it would be easy to fight covid 19 .
So in present why does we can't make vaccine of sars virus and fight covid 19
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- Efficiency of Virus Particle
- No idea that from where it is spreaded
- Unknown identity of First Patient
- Lack of effective tools
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