big swollen lymph node under left armpit appeared.~48 hours after shot felt mostly back to normal except for lymph node which remains (getting smaller over time); Morning (~24 hour mark): horrible body aches (lower back); Morning (~24 hour mark): horrible body aches (knee pain); Morning (~24 hour mark): horrible body aches (leg pain); 11 hours after injection: feverish began That night: 101-102 fever through out the night; up every 2 hours; 11 hours after injection: chills/ began; 11 hours after injection: tired began; This is a spontaneous report from a contactable consumer, the patient. A 23-year-old non-pregnant female patient received the second dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EP6955) via an unspecified route of administration in the arm left on 06Apr2021 at 11:00 (at the age of 23-year-old) as a single dose for COVID-19 immunisation. Medical history included the patient was allergic to pecans, walnuts, penicillin, sulfa drugs and gluten intolerance. Prior to the vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19. The patient did not receive any other vaccines within four weeks prior to the vaccination. The patient's concomitant medication included sertraline hydrochloride (ZOLOFT) 100mg and ethinylestradiol;norgestimate (TRI ESTARYLLA) both from an unknown date for an unknown indication and unknown if ongoing. The patient previously received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EP6955) via an unspecified route of administration in the arm left on 16Mar2021 at 14:30 (at the age of 23-year-old) as a single dose for COVID-19 immunisation. The patient previously took Cefalexin and experienced an allergy towards it. On 06Apr2021 at 22:00, approximately 11 hours after vaccination, the patient experienced to be feverish/chills/tired with 101-102 fever throughout the night. On 07Apr2021 at 11:00, approximately 24 hours after the vaccination, the patient experienced horrible body aches (lower back and knee/leg pain), fever hasn't broken still 100-101. On 07Apr2021 at 12 (25 hours later) and the pain was bad, the fever was still there and the patient took 2 Advil after Advil wore off. On 07Apr2021 at 23:00, 36 hours after the vaccination, fever was low but still 99-100 and body aches, the patient also experienced a big swollen lymph node under left armpit appeared. On the same day night, the patient's fever broke and woke up with still painful swollen lymph node under the left armpit but no fever. On 08Apr2021, 48 hours after the vaccination, the patient felt mostly back to normal except for the lymph node which remains (getting smaller over time). Therapeutic measures were taken as a result of the events included treatment with ibuprofen (ADVIL). The events did not result in doctor or other healthcare professional office/clinic visit, emergency room/department or urgent care. The clinical outcome of the events feverish/chills/tired, body aches (lower back and knee/leg pain) and painful swollen lymph node was resolving at the time of the report.  No follow-up attempts are needed. No further information is expected.