arm soreness; This is a spontaneous report from contactable reporter(mother), reporting for her daughter (patient) A female patient of unknown age received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number: unknown), via an unspecified route of administration in left arm on 08Apr2021 as a single dose for COVID-19 immunization. The patient's medical history and concomitant medications were not reported. On an unknown date, the patient stated about Pfizer COVID-19 vaccine who says it was hard to figure out where to call. She said that they had their first dose April 8th. She says that they had a family member that passed away last Tuesday, and around that time was when they contracted and tested positive for COVID-19, for which they have been quarantined. She says that there had been a lot of people in and out of where they were after her mother in law passed, and some were wearing masks and some weren't. She says she and her son tested this past Tuesday which was positive, and they told her May 4th was when they could get their second dose after quarantining. She says that her husband was tested Monday and was positive and he was told it would be the 30th or something like that. Caller says that her son was tested Wednesday, and was told he was positive, and he also must be asymptomatic. She says all three of them tested positive out of the four that went, only her daughter was negative. She says that she needs to reschedule shots for the second dose that were scheduled for 24th of April, but she was not sure how to go about that. The patient says her husband went in related to his allergies to get tested. She says it was her mother-in-law that had passed, then Tuesday they all got tested and they were all negative. She says her husband started feeling like he had allergies Friday after he cut the grass, and her son is a crazy person about COVID, but he has asthma so he wanted them to all get tested again since allergies can be like COVID, and her husband's test was positive, so then she and her son got tested and they were positive, so they had three positives out of the four family members who got the first dose. She clarifies that her mother in law didn't get the vaccine, but she she had passed away Tuesday, and they contracted COVID during that time after she passed away at home. She says they contracted something from there, since they haven't been anywhere else and have stayed at home other than going there after her mother in law passed away. The patient says that they were all fine after they got the first dose of the vaccine, they had a sore arm that day that went away with no side effects. She says they all took the COVID-19 shot on April 8th. Caller says that her mother in law passed away on the 13th, and her husband had allergies kind of after, and she and her son had nothing. She says that they have no congestion, fever, none of that stuff. She says she was really shocked when they gave her the result that she was positive. The patient underwent lab tests and investigation results which included COVID-19 PCR test for which the result was negative. The outcome of the events was unknown.   No follow-up attempts are needed; information about lot/batch number cannot be obtained.   No follow-up attempts are needed; information about lot/batch number cannot be obtained.