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:

Investigadores de 2 compañías 🇺🇸 han comenzado fase de pruebas en humanos de posibles vacunas vs COVID-19:
Moderna Therapeutics (Massachusetts), junto a Institutos Nacionales de la Salud.
Inovio Pharmaceuticals (Pensilvania), junto con la Fundación Bill y Melinda Gates. https://t.co/qYsD9Lju52