Fig. 4From: Differential immunogenicity of BNT162b2 or ChAdOx1 vaccines after extended-interval homologous dual vaccination in older peopleSpike-specific vaccine responses in younger and older cohorts. Responses following single or dual vaccination with A) BNT162b2 or B) ChAdOx1 in donors aged 80+ or 42–79 years. i) Spike-specific antibody responses by age and by vaccine dose. ii) Spike-specific Elispot response following second vaccineBack to article page