The limited data we have shows that immunity among vaccinated people is waning. But how much and when is another story. POLITICO's Sarah Owermohle reports. Sarah Owermohle is a health reporter for POLITICO. Jeremy Siegel is a host for POLITICO Dispatch. Irene Noguchi is the executive producer of POLITICO audio. Jenny Ament is the senior producer of POLITICO audio. Raghu Manavalan is a senior editor for POLITICO audio. Subscribe to the POLITICO Pulse newsletter.