One of her daughters has been fully vaccinated with Pfizer Covid19 vaccine and experienced "chills and stuff and just couldn't get warm"; One of her daughters has been fully vaccinated with Pfizer Covid19 vaccine and experienced "chills and stuff and just couldn't get warm"; This is a spontaneous report from a contactable consumer or other non hcp (parent) from a Pfizer sponsored program. A female patient of an unspecified age received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number was not reported) via an unspecified route of administration on an unspecified date at dose 2, single and received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number was not reported) via an unspecified route of administration on an unspecified date at dose 1, single for covid-19 immunisation. Medical history and concomitant medications were not reported. On an unspecified date the patient experienced one of her daughters has been fully vaccinated with pfizer covid19 vaccine and experienced chills and stuff and just could not get warm. Reporter is a consumer with many concerns regarding her college-aged daughters receiving the Pfizer-Biontech Covid19 vaccine. She indicated she was trying to get medical exemptions before they returned to school in the fall. She reported a letter to parents indicated an exemption could be acquired (for medical or religious reasons) because the product is not FDA-approved. She has 3 daughters, total: 2 with asthma, 1 that is allergic to peanuts, and 1 takes specific birth control pills due to her migraine with aura. One of her daughters has been fully vaccinated with Pfizer Covid19 vaccine and experienced chills and stuff and just could not get warm but continued to go to work. The youngest (19 y/o female) has asthma and is allergic to peanuts. Mom discussed vaccination exemption with the allergist, who indicated it would be more beneficial for her to receive vaccination; no medical exemption indicated. This child also has dermographism and reports she felt the liquid go in her arm when she received a flu shot, previously, and later fainted after that flu shot. She also has a daughter who has migraine with aura that is managed with birth control pills. Will the vaccine affect her cycle. She additionally called for someone else who has been fully vaccinated with the Pfizer-Biontech Covid19 vaccine series in May and has since been prescribed valacyclovir. For menstrual changes question: answered Per FAQ-: The authorized EUA Prescribing Information for the Pfizer-BioNTech COVID-19 Vaccine does not list menstrual changes as adverse reaction from clinical studies and post authorization experience. Reporter is a consumer, calling on behalf of someone else. She reports the patient has received both doses of the Pfizer-Biontech covid19 vaccine, finishing the series sometime in May, but is now being prescribed valacyclovir. Will the antiviral interact with the vaccine. Question: reporter is a consumer with many concerns regarding her college-aged daughters receiving the Pfizer-Biontech Covid19 vaccine. She indicated she was trying to get medical exemption, since the product has not been FDA approved. Outcome of the events was unknown.  Information regarding the lot/batch number has been requested.  Follow up (20Aug2021): No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.