Taiwanese friends tell me that during the SARS outbreak, China refused to share data with them which it shared with every other country. Taiwan was hit very hard because they were flying blind. This led them to establish independent monitoring and early warning systems since they have extensive trade and cultural links with China and large numbers of travelers.
The current VP of Taiwan is an epidemiologist who was the health minister during the SARs outbreak and their current response has been one of the most effective (108 cases, 1 death).
Every country would want to work with Taiwan on this issue not ostracize them like the WHO. They are like a monitoring and early-warning system for these kinds of pathogens coming out of China.