Fever; Chills; Muscle ache; under his arm pits were swollen; he just felt wiped out and tired; had the achy body and a headache; he still feels a little weak; got really cold; he still feels a little weak and lightheaded to this day but is a million times better; had an achy body.; Caller reports getting sick after the second dose; they administered the vaccine accidentally to a patient after two weeks (14 days) of getting the first dose; This is a spontaneous report received from contactable reporter(s) (Pharmacist and Consumer or other non HCP) from medical information team. Other Case identifier(s): US-PFIZER INC-202101218835 (Pfizer).  A 41 year-old male patient received bnt162b2 (BNT162B2), administered in arm right, administration date 08Sep2021 (Lot number: FF2588) at the age of 41 years as dose 2, single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE, Batch/lot number: FC3182, Location: Right arm, Note:, after the first  dose he was fine, states his arm was just sore a little bit.), administration date: 25Aug2021, when the patient was 41 years old, for Covid-19 Immunization, reaction(s): "his arm was just sore a little bit.". The following information was reported: INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (non-serious) with onset 08Sep2021, outcome "unknown", described as "they administered the vaccine accidentally to a patient after two weeks (14 days) of getting the first dose"; PYREXIA (non-serious), outcome "unknown", described as "Fever"; CHILLS (non-serious), outcome "unknown", described as "Chills"; MYALGIA (non-serious), outcome "unknown", described as "Muscle ache"; ILLNESS (non-serious) with onset 08Sep2021, outcome "recovering", described as "Caller reports getting sick after the second dose"; PERIPHERAL SWELLING (non-serious), outcome "unknown", described as "under his arm pits were swollen"; FATIGUE (non-serious), outcome "unknown", described as "he just felt wiped out and tired"; HEADACHE (non-serious), outcome "unknown", described as "had the achy body and a headache"; ASTHENIA (non-serious), outcome "unknown", described as "he still feels a little weak"; FEELING COLD (non-serious), outcome "unknown", described as "got really cold"; DIZZINESS (non-serious), outcome "unknown", described as "he still feels a little weak and lightheaded to this day but is a million times better"; PAIN (non-serious), outcome "unknown", described as "had an achy body.". Therapeutic measures were not taken as a result of inappropriate schedule of product administration, pyrexia, chills, myalgia, illness, peripheral swelling.  Additional Information: Caller states that night of the vaccine, around midnight, he started feeling sick, states he had chills, got really cold, had an achy body. States the chills lasted a few hours, states he took a shower at 3 am to get warm, states after that he had chills off and on the next day, states he just felt wiped out and tired, had the achy body and a headache. Caller confirms he still feels a little weak and lightheaded to this day but is a million times better. States under his arm pits were swollen and still a little swollen today. Treatment in response to adverse event: Pharmacist stated, "No, he didn't do anything."  Follow-up attempts are completed. No further information is expected.