Patient had a period of about 24 hours of just aching/ after first booster dose it lasted longer than 24 hours; Patient had flu symptoms/ after first booster dose lasted longer than 24 hours, like a case of the flu; This spontaneous case was reported by a patient and describes the occurrence of PAIN (Patient had a period of about 24 hours of just aching/ after first booster dose it lasted longer than 24 hours) and INFLUENZA (Patient had flu symptoms/ after first booster dose lasted longer than 24 hours, like a case of the flu) in an elderly female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 prophylaxis.     The patient's past medical history included Pacemaker insertion (cardiac) (Pacemaker placement. Takes medication for it, but does not provide product names.) in 2016. Concurrent medical conditions included Blood pressure high (Takes medication for it, but does not provide product names. Diagnosed for at least 20-25 years.).   On an unknown date, the patient received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form, second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form and first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced PAIN (Patient had a period of about 24 hours of just aching/ after first booster dose it lasted longer than 24 hours) and INFLUENZA (Patient had flu symptoms/ after first booster dose lasted longer than 24 hours, like a case of the flu). At the time of the report, PAIN (Patient had a period of about 24 hours of just aching/ after first booster dose it lasted longer than 24 hours) and INFLUENZA (Patient had flu symptoms/ after first booster dose lasted longer than 24 hours, like a case of the flu) had resolved.            No concomitant medications were reported.  On 11-Oct-2022, the patient received fifth dose Pfizer Bivalent booster dose (unknown route) 1 dosage form, Batch/lot number was GH9693 on left upper arm at mid-morning between 9AM-10AM.  On 12-Oct-2022, the patient experienced dizziness and no balance, like vertigo, vomiting and nausea. At the time of the report, dizziness, and no balance, like vertigo and nausea had recovering and vomiting had recovered (vomiting was began about 4:30 PM stopped about 9PM yesterday).  On 13-Oct-2022, the patient experienced jitteriness, shaking all over. At the time of the report Jitteriness, shaking all over had not recovered. Patient was not COVID-19 positive with the Omicron variant.  It was reported, patient stated like within 26 hours of taking the Pfizer Bivalent booster dose shot, patient started had severe dizziness and no balance, almost like vertigo. Was vomiting and it finally stopped about the middle of last night. Vomiting lasted for about 4 hours. Patient still just as nauseous this morning but had nothing to get rid of was just jittery and shaking all over. Dizziness and no balance, like vertigo: it was not as bad. It was like patient was been on a roller coaster and had a swimming head today. It was like equilibrium was off. Patient balance was back. Vomiting had stopped, nauseous feeling was still there. Feels jittery just jerky inside.  With every one of the Moderna COVID-19 vaccine injections patient had a period of about 24 hours of just aching like, had flu symptoms. With the first booster dose of the Moderna, it lasted longer than 24 hours, like a case of the flu and that was it. Patient did not go to the doctor, just rested and that was it.