This is because Methodist Hospital System is partnered with research efforts

Greg Abbot tweet :REPORT: PFIZER PICKS TEXAS FOR COVID-19 VACCINE PILOT DELIVERY PROGRAM

https://twitter.com/gregabbott_tx/status/1328759290199494660?s=21

https://www.kvue.com/amp/article/news/health/coronavirus/coronavirus-pfizer-vaccine-pilot-delivery-program/507-ca6b29d4-ba9e-46fc-af84-65275b67862e?__twitter_impression=true

TriNetX includes Pfizer I

https://www.outsourcing-pharma.com/Article/2019/02/28/Houston-Methodist-ups-TriNetX-network-with-1.3m-patients?utm_source=copyright&utm_medium=OnSite&utm_campaign=copyright