The problem is less discovering the vaccine - though corona viruses seem to be a quite challenge in this respect - but to get it to the point where it can be us

The problem is less discovering the vaccine - though corona viruses seem to be a quite challenge in this respect - but to get it to the point where it can be used. For that it needs to be proven: - that it is harmless. As vaccines are to be used on healthy people, it needs to be very safe. And of course - it needs to be shown to be effective. So even if we find a vaccine right now, it will take at least a year until it can be deployed. Though in this case, everything will be tried to cut the time short.