symptomatic sars cov 2 infection in a booster subject; symptomatic sars cov 2 infection in a booster subject; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp). the reporter is the patient. a 76 year-old male patient received bnt162b2 (comirnaty) (batch/lot number: unknown) as dose 3 (booster), single for covid-19 immunisation. relevant medical history included: "diabetes" (unspecified if ongoing), notes: in good multidrug control. the patient's concomitant medications were not reported. vaccination history included: comirnaty (dose 1, single), for covid-19 immunization; comirnaty (dose 2, single), for covid-19 immunization. the following information was reported: suspected covid-19 (medically significant), drug ineffective (medically significant), outcome "recovering" and all described as "symptomatic sars cov 2 infection in a booster subject. the lot number for bnt162b2 was not provided and will be requested during follow up. clinical course: symptoms: cold sore hoarseness, not fever, in apparent rapid resolution