China has seen several uplifting milestones reached recently
All 14 temporary hospitals in Wuhan have been closed down. The South China Morning Post has stated that the virus is currently passing its peak, as only 11 new cases were reported on March 13th, most of which came form international travellers. Parks and tourist attractions are slowly starting to re-open as well- but are under heavy moderation.
The theory behind vaccination is, that you inject a deactivated version of whatever you want to vaccinate against in the body, and thus the immune system riggs up it´s defenses against that intruder. This process takes quite some time.
If you want to go to a Malaria stricken country, you have to vaccinate in time, like quite a few weeks prior, or else you won´t be protected.
So when you vaccinate against the flu amidst flu season - would you be protected?