Claim: The CDC and a Pfizer-affiliated pharmaceutical company sponsored a pro-LGBT public school event for fifth-grade students.

What the evidence shows

The claim refers to the Galaxy Summit organized through the Chicago Public Schools system. Available reporting states that ViiV Healthcare was a sponsor of the event. ViiV Healthcare is a pharmaceutical company focused on HIV medicines and is a joint venture involving GSK, Pfizer and Shionogi.

Reporting also identified the Centers for Disease Control and Prevention among organizations associated with or sponsoring the event. The event was described by Chicago Public Schools as an educational gathering intended to provide an affirming environment for students and to address diversity, gender, sexuality and related subjects.

However, the wording of the claim can give the impression that the CDC and Pfizer directly organized or jointly ran the event. The available information does not establish that interpretation. The sponsorship and organizational relationships are more specific: ViiV Healthcare was a sponsor, while the event itself was organized through the Chicago Public Schools and associated organizations.

Reports also described activities involving gender identity, pronouns and LGBTQ advocacy. Those descriptions should be distinguished from broader claims about what every fifth-grade student was taught or required to do.

Conclusion

The core claim is partially supported: the Galaxy Summit was a Chicago Public Schools event involving LGBTQ-related content, and ViiV Healthcare, a company with Pfizer ownership ties, was identified as a sponsor. However, describing it simply as a CDC-and-Pfizer-sponsored event for fifth graders overstates the documented organizational relationships and requires additional context.