Dose 1: Moderna Covid-19 vaccine and received the second vaccine series dose as the Pfizer vaccine because the Moderna vaccine was not available; Dose 1: Moderna Covid-19 vaccine and received the second vaccine series dose as the Pfizer vaccine because the Moderna vaccine was not available; sore left arm; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient. Other Case identifier(s): MOD-2023-719682 (Moderna).  A 60-year-old male patient received BNT162b2 (BNT162B2), on 11Apr2023 as dose 2 (initial pfizer dose), single (Lot number: FR2583) at the age of 60 years, in left arm for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: spikevax (Dose 1, lot number: AS7171B , Expiration date: Jun2023, anatomical location: left arm), administration date: 09Jan2023, when the patient was 60-year-old, for COVID-19 Immunization, reaction(s): "left arm soreness and tenderness", "flu like symptoms", "chest cold". The following information was reported: OFF LABEL USE (non-serious), INTERCHANGE OF VACCINE PRODUCTS (non-serious) all with onset 11Apr2023, outcome "unknown" and all described as "Dose 1: Moderna Covid-19 vaccine and received the second vaccine series dose as the Pfizer vaccine because the Moderna vaccine was not available"; VACCINATION SITE PAIN (non-serious) with onset 2023, outcome "not recovered", described as "sore left arm". Additional information: Clinical course: Patient received his first Moderna Covid-19 vaccine on 09Jan2023 lot number AS7171B Expiration date Jun2023 Patient received the vaccine in his left arm and had left arm soreness and tenderness. The patient did not get his second dose in early Feb2023 because he had flu like symptoms in early February. The patient was exposed to a person who had Covid-19 in early March however the patient never tested for Covid-19. In late March, the patient caught what felt like was a chest cold. His physician prescribed Azithromycin. More than 28 days after his first dose. The patient was told recently that he could not receive his second dose of the Moderna Covid-19 vaccine because the vaccine was not available. The patient was a musician and was going on an overseas tour to different countries. The patient said that he was very angry that Moderna did not inform him what to do after the Moderna Monovalent vaccine was recalled. The patient was upset that Moderna did not inform patients who had received their first primary dose of the Moderna Covid-19 vaccine that the second dose would not be available in April. The patient has been looking for his second Moderna dose since Monday. On 11Apr2023, patient received the second vaccine series dose as the Pfizer vaccine because the Moderna vaccine was not available to receive. Pfizer lot number FR2583 expiration date was not known. Patient received in his left arm. Patient has a sore left arm currently. Patient received this vaccine after receiving instructions from the health institutions and human services for (county and state withheld). The patient mentioned that he read that if a patient received a Moderna dose and a Pfizer dose that this may work better and so the patient was happy about that. The patient did not receive any other vaccines in the 4 weeks prior to COVID-19 vaccine.