Possibly those weeks could make a difference; I'd imagine vaccine development is highly parallelised relative to a normal year, and there may be something in the next 6 months. 4 weeks in that scenario could be huge.
> Marks said a real late-stage trial to test a vaccine is likely “months away.” One concern is that some previous coronavirus vaccines have caused worsening of the disease, not improvement.
> “We have to make sure that as we proceed with development, we’re not creating problems,” Marks said. It might be realistic, he said, for studies of vaccines to begin by the summer, although that timeline is still aggressive.
[1] https://www.statnews.com/2020/02/26/coronavirus-vaccines-are...