You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

China has not shared any #COVID19 virus or clinical samples to the best of our knowledge. The United States is calling on the Chinese Communist Party to be transparent with the world so that we can combat the #coronavirus and prevent future pandemics of this scale. https://t.co/9ktNtj1VJy