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:

Soul-searching questions for Navarro: What's behind the closure of the biolab at Fort Detrick? What's the connection between the closure, vaping lung disease, the flu &amp; #COVID19? When will US invite experts to investigate the origin of the virus in US?
 https://t.co/n6tNU8Y845