not feeling well; sore; runny nose; sore throat; swollen glands; sweats; chills; feeling like she was hot and cold; dry throat; nausea; a little stomach upset; left arm was sore for several days too; Headache; muscle ache; joint pain; This is a spontaneous report from a Pfizer-sponsored program Pfizer First Connect. A contactable a 50-year-old female Registered Nurse reported for herself that she received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), via an unspecified route of administration on 17Dec2020 11:40 on Deltoid Left at single dose for covid-19 immunisation. Medical history included was none. There were no concomitant medications. The patient experienced headache, muscle ache, joint pain, left arm was sore for several days too on 17Dec2020; not feeling well, sore, runny nose, sore throat, swollen glands, sweats, chills, feeling like she was hot and cold, dry throat, nausea, a little stomach upset on an unknown date. The detail clinical course was provided as following: the nurse reported side effects and want to verify if side effects that "keep coming and going back every couple days" are "normal". Received first dose last 17Dec2020 and felt side effects on the evening. Returned on Monday last week, lasted until Friday, and back on 06Jan2021. The patient had developed a runny nose, sore throat, and feeling like she was hot and cold. She said she had sweats and chills, but no fever. She said she kept getting a warm sensation, and checked her temperature several times, but did not have a fever. She said she had a super dry throat, and her throat felt like a desert. She said she had swollen neck glands, clarifying the swollen neck glands were underneath her mandible. She said she had nausea, and a little stomach upset with no diarrhea. She said she was still not feeling well in her stomach. Reported last week she had 3 days with a nonstop headache, swollen glands, and a sore throat. She said the headache, swollen glands, and sore throat went away, but are back again, 06Jan2021. She said she was thinking what she was experiencing was more a side effect of the COVID-19 Vaccine than being ill because her symptoms went away and now were back. She said when a person was ill, the person got through the illness, and that was it, but her symptoms kept going away and coming back. Clarified the night of 17Dec2020, she had a headache and some muscle aches and joint pain, specifically in her neck. She said her left arm was sore for several days too. She said everything went away. She said she started feeling sick again last Tuesday, 29Dec2020, and felt ill through Friday, 01Jan2021. She said over the weekend she felt fine, and then on 06Jan2021, she was feeling ill with the same symptoms of a headache, sore throat, runny nose, and swollen glands. She said she thought it was odd that the symptoms came back again. She said maybe what she was experiencing were not side effects from the COVID-19 Vaccine, and she was ill. She said it was odd that she felt bad and then felt better, and then the symptoms come back again. Reported she can work through her symptoms, clarifying she had mild symptoms. The event outcome was unknown. All events were reported as non-serious. The events did not require a visit to: Emergency Room or Physician Office. Prior Vaccinations (within 4 weeks): None. Relevant Tests: None. Treatment: Declined any Reported she was scheduled to get her second COVID-19 Vaccine dose on 07Jan2021.   Information on the lot/ batch number has been requested.