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:

The U.S. is committed to research to find a vaccine for #COVID19. This continues a long history of scientific research and development of vaccines to fight diseases around the world. https://t.co/Kwerl55kQB