her doctor thought she may have COVID during that time; chills; fevers; muscle aches; weakness/but still weak; short period of nausea; sore throat; earaches; brain fog; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 22Sep2022 as dose number unknown (booster), single (Batch/Lot number: unknown) for covid-19 immunisation; coviD-19 vaccine (COVID-19 VACCINE), as dose number unknown, single (Batch/Lot number: unknown). The patient's relevant medical history and concomitant medications were not reported. The following information was reported: FEELING ABNORMAL (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "not recovered", described as "brain fog"; CHILLS (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering"; EAR PAIN (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering", described as "earaches"; PYREXIA (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering", described as "fevers"; SUSPECTED COVID-19 (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "not recovered", described as "her doctor thought she may have COVID during that time"; MYALGIA (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering", described as "muscle aches"; NAUSEA (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering", described as "short period of nausea"; OROPHARYNGEAL PAIN (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "recovering", described as "sore throat"; ASTHENIA (non-serious) with onset Sep2022, 12 hrs after the suspect product(s) administration, outcome "not recovered", described as "weakness/but still weak".  Additional Information: The patient stated that she received the booster dose last 22Sep2022, and within 12hrs, she started experiencing side-effects namely: chills, fevers, muscle aches, weakness, short period of nausea, sore throat and earaches, brain fog, and continued weakness. She mentioned that she was still experiencing brain fog and weakness during the time of the call. She also mentioned that she did not have any illness before the booster. She also mentioned that her doctor thought she may have COVID during that time, but she wanted to see if the SEs could be attributed to the booster vaccine. She has also mentioned during the call that she is "getting better but still weak". She wanted to see if the SEs she experienced were reported SEs of the omicron booster or did she have COVID. She asked if during the time she was symptomatic, if she was contagious due to the booster vaccine if it was not COVID. Considering that it is already December, and she has experiencing lingering SEs, she asked how long do the SEs last.  The information on the batch/lot number for BNT162b2, BNT162b2 omi ba.4-5 has been requested and will be submitted if and when received.