Chills; Muscle ache; Headache; Did not feel well in general; Right arm soreness in the same arm that the COVID vaccine was given; It was hard to lift her arm and woke her up when she was sleeping; It was hard to lift her arm and woke her up when she was sleeping; This is a spontaneous report from a contactable consumer (patient, occupation: Respiratory Therapist). A 50-year-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, lot number and expiration date not provided), via an unspecified route of administration on 22Dec2020 11:00 (reported as Approximately 11am in the morning) at single dose to help stop the spread of COVID. Location of the COVID Vaccine: Right arm. There was no additional Vaccines Administered on Same Date of the Pfizer Suspect. There were no prior Vaccinations with 4 weeks. Medical history included she had tested positive for COVID on 02Oct2020. The patient did not have any illness at time of vaccination. Family Medical History Relevant to adverse event also reported as none. There were no concomitant medications. The patient previously had flu vaccine given at the hospital she works at and She had mild arm soreness after the Flu vaccine. The patient experienced Right arm soreness in the same arm that the COVID vaccine was given on 22Dec2020, Chills on 23Dec2020, Muscle ache on 23Dec2020, Headache on 23Dec2020, did not feel well in general on 23Dec2020. Caller reported that she experienced right arm soreness, in the arm she received the vaccine, that was unlike any other vaccine she had ever had. The arm soreness began the same evening as the day she received the COVID vaccine. It was hard to lift her arm and woke her up when she was sleeping in Dec2020. The remainder of the side effects began the following morning after she had received the COVID Vaccine. Other side effects included chills, which lasted until the 24th or 25Dec2020. Muscle aches, which lasted until the 24th or 25th Dec2020. Headaches, which she is still getting off and on, but it is hard to say if the headaches that she is still getting is still from the COVID vaccine. The headaches are coming less often. She has had to take something for the headaches. Caller stated that she did not feel well, in general. Asked caller what other vaccines she had received and had experienced arm soreness but not to the extent she had after the COVID Vaccine and caller stated that she had mild arm soreness after the Flu vaccine. Previous flu vaccines had been given to her at the hospital she works at; therefore, she did not have any lot number information for these flu vaccines. The reported adverse events did not require a visit to Emergency Room and Physician's office. The patient was not hospitalized. The outcome of event Right arm soreness in the same arm that the COVID vaccine was given was recovered on 26Dec2020, the outcome of the event Chills, Muscle ache was recovered in Dec2020, the outcome of the event did not feel well in general was recovered on 25Dec2020. The outcome of the event Headache was recovering. The outcome of the other events was unknown. The causality assessment for events Right arm soreness in the same arm that the COVID vaccine was given, Chills, Muscle ache, Headache, did not feel well in general with suspect COVID vaccine was assessed as related by Primary Source Reporter via Method of assessment Global Introspection.  Information on the lot/batch number has been requested.