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:

Dear @DrTedros and @WHO,
Last month you called on all nations to join forces to develop a #coronavirus vaccine.
The EU answered with the #GlobalResponse and put its convening power at the service of the @UN.
In times like these, the greatest act of courage is to play as a team. https://t.co/f7Co2Isn3Q