The latest data published to the ZOE Symptom Study App, which has monitored the impact of the vaccines on over a million users, shows declining protection in the months following the second jab.
Protection seems to drop off quite dramatically at around four months.
Although as Professor Tim Spector, lead scientist on the ZOE Symptom Study App, cautioned, the data is limited.
Nonetheless, “for both vaccines, the prevention of infection is waning over time”, he warned.