DIZZINESS AND LIGHT HEADNESS; LEG LOCK; BLURRED VISION; SLIGHT TO MEDIUM DIFFICULTY BREATHING; CHEMICAL AND METALLIC TASTE WITH FOOD AND DRINKS; INJECTION SITE ITCHING; HARDENING OF THE INJECTION SITE; CHEST PAIN; MODERATE SWELLING OF THE BOTTOM ROW OF GUMS WHICH WAS INFLAMED AND BRIGHT RED; CHILLS; RINGING OF THE RIGHT EAR; TEMPORARY ITCHY RASH ON FACE AND NECK; TINGLY SENSATIONS IN THE FACE (TEMPORARY LASTED ABOUT 3 HOURS); SWELLING AT INJECTION SITE (LEFT DELTOID AREA); PAIN AT INJECTION SITE (LEFT DELTOID AREA); WEAKNESS; NAUSEA; FEVER; This spontaneous report received from a patient concerned a 26 year old female. The patient's weight was 236 pounds, and height was 67 inches. The patient's concurrent conditions included: penicillin allergy, tegaderm allergy, red onions allergy, no alcohol use, non-smoker, and birth control implant, and other pre-existing medical conditions included: Patient had no history of drug abuse or illicit drug use. The patient received covid-19 vaccine ad26.cov2.s (suspension for injection, route of admin not reported, batch number: 203A21A, expiry: 21-SEP-2021) dose was not reported, administered on 13-AUG-2021 for prophylactic vaccination. Concomitant medications included etonogestrel for birth control. On 14-AUG-2021, the patient experienced dizziness and light headness.  On 14-AUG-2021, the patient experienced leg lock. On 14-AUG-2021, the patient experienced blurred vision. On 14-AUG-2021, the patient experienced slight to medium difficulty breathing. On 14-AUG-2021, the patient experienced chemical and metallic taste with food and drinks. On 14-AUG-2021, the patient experienced injection site itching. On 14-AUG-2021, the patient experienced hardening of the injection site. On 14-AUG-2021, the patient experienced chest pain. On 14-AUG-2021, the patient experienced moderate swelling of the bottom row of gums which was inflamed and bright red. On 14-AUG-2021, the patient experienced chills. On 14-AUG-2021, the patient experienced ringing of the right ear. On 14-AUG-2021, the patient experienced temporary itchy rash on face and neck. On 14-AUG-2021, the patient experienced tingly sensations in the face (temporary lasted about 3 hours). On 14-AUG-2021, the patient experienced swelling at injection site (left deltoid area). On 14-AUG-2021, the patient experienced pain at injection site (left deltoid area). On 14-AUG-2021, the patient experienced weakness. On 14-AUG-2021, the patient experienced nausea. On 14-AUG-2021, the patient experienced fever. Treatment medications (dates unspecified) included: paracetamol, and ibuprofen. The action taken with covid-19 vaccine ad26.cov2.s was not applicable. The patient recovered from leg lock, chest pain, and tingly sensations in the face (temporary lasted about 3 hours) on 14-AUG-2021, and blurred vision, chemical and metallic taste with food and drinks, and temporary itchy rash on face and neck on 15-AUG-2021, and had not recovered from dizziness and light headness, ringing of the right ear, weakness, nausea, slight to medium difficulty breathing, injection site itching, hardening of the injection site, fever, moderate swelling of the bottom row of gums which was inflamed and bright red, swelling at injection site (left deltoid area), pain at injection site (left deltoid area), and chills. This report was non-serious.