outbreak of herpes/outbreak of cold sores like herpes; outbreak started last night, and has gotten worse; This is a spontaneous report from a contactable consumer. A 62-year-old female patient received the first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EN6205, Expiration date: Unknown), via an unspecified route of administration in left arm on 01Mar2021 at 9:02AM (at the age of 62-years) as single dose for covid-19 immunization. The patient medical history included pernicious anemia. The patient did not receive any other vaccinations within four weeks prior to the first administration date of the suspect vaccine bnt162b2. The patient did not have any adverse events following prior vaccinations. The patient had no previous history of immunization with the Pfizer vaccine considered as suspect. The patient had no relevant family history relevant to the adverse event. Concomitant medications included cyanocobalamin (B-12) injection once a month for pernicious anemia. The patient's last dose cyanocobalamin was in the end of Dec2020. She stated that she though she was behind a little on the doses. The patient stated that she took bnt162b2 vaccine because she didn't have a good immunity. On 04Mar2021, the patient experienced outbreak of herpes. The patient stated that she had vaccine on Monday, 01Mar2021 and wanted to know if anyone had reported an outbreak of herpes following the vaccine. She stated she weighed too much. The patient stated that the outbreak started last night and had gotten worse. She stated that she only gets the outbreaks when her body is under stress, either emotional stress or a sickness. She just wanted to make sure that it's okay to take the acyclovir. Her doctor told her that it was okay to take it, but it's an anti-viral medication, and she didn't want to use anti-viral with the vaccine. The patient stated that the only thing she was been able to find online was not to take the acyclovir before getting the vaccine, and it had been a few days since she got the vaccine. The patient stated she had hit option and had got to safety. The patient stated she had outbreak of cold sores like herpes on 04Mar2021. The patient stated she had the COVID-19 vaccine on Monday, 01Mar2021 and it was the first of the two doses and it was the Pfizer vaccine. The patient wanted to know if anybody was reporting an outbreak of cold sores like herpes following the injection. The patient was informed about the role of Pfizer Drug Safety and Pfizer Medical Information. The patient was provided with the contact number for Pfizer Medical Information. Upon request for permission to probe questions for a safety report, the patient stated that she did not call for that. She stated she called because she thought she had a reaction. The patient provided consent to follow-up. The patient provided her mailing address. She stated that she was at work and could not stay on the phone for so long. The patient stated that it had already been around 25 minutes on the phone. The product details and pharmacy details could not be probed as the patient was unwilling to complete the report. Hence limited information was available over the call. The event did not lead to emergency room visit or physician office visit. The patient did not undergo any relevant diagnostic and confirmatory test for the event. The outcome of the events was not recovered.  No follow-up attempts are possible. No further information is expected.