Except China did accept the offer
Beijing, after initially blocking requests from the United States, has agreed to permit authorities from the Centers for Disease Control and Prevention to take part in an international investigation of the global health crisis caused by the rapidly spreading Wuhan coronavirus.
www.washingtontimes.com
Fiscal year 2019 starts in 2018 (Oct thru Sept) Meaning this the budget for last year. This is all I am pointing out.
It just might be tough luck on a guess that they decided to move funding from China to other areas and then we have this outbreak in China. No even going to fault them for that. But you shouldn't beat your chest about it either when they were wrong which areas they might need to concentrated efforts on.