pain at injection site; Needle barely went under the skin/given to her under the skin and not in the muscle/Inappropriate route of vaccination; violent chills that last about another 12 hours or so; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team, Program ID: (002191; 159558). The reporter is the patient.  An 81-year-old female patient received bnt162b2 omi xbb.1.5 (COMIRNATY (2023-2024 FORMULA)), as dose 1, 0.3 ml single (Batch/Lot number: unknown) subcutaneous for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE), for COVID-19 immunisation; Bnt162b2 (DOSE 2, SINGLE), for COVID-19 immunisation; Bnt162b2 (DOSE 3 (BOOSTER), SINGLE), for COVID-19 immunisation; Bnt162b2 (DOSE 4 (BOOSTER), SINGLE), for COVID-19 immunisation; Bnt162b2 (DOSE 5 (BOOSTER), SINGLE), for COVID-19 immunisation; Flu vaccine/influenza vaccine (DOSE NUMBER UNKNOWN, SINGLE), for Influenza immunisation. The following information was reported: CHILLS (non-serious), 12 hrs after the suspect product(s) administration, outcome "recovered", described as "violent chills that last about another 12 hours or so"; VACCINATION SITE PAIN (non-serious), outcome "unknown", described as "pain at injection site"; INCORRECT ROUTE OF PRODUCT ADMINISTRATION (non-serious), outcome "unknown", described as "Needle barely went under the skin/given to her under the skin and not in the muscle/Inappropriate route of vaccination".  Additional information: Caller got all the vaccines she can feel it in her muscle, when she got the vaccine today but did not feel it, she knows that it should be in the muscle. She would like to know if it should be inserted in the muscle. She had 6 adverse reactions (pain at injection site). Caller, female, aged 81, got the Comirnaty 12+2023-24 booster today at (pharmacy name withheld). She's had 5 previous Covid vaccines, and all of them have been from Pfizer. With the five previous vaccinations, she felt all of them go into her arm muscle. Today when she got the vaccine, the needle barely went under the skin. The person who administered the vaccine, said something to the effect of thank you or that's good and told her its not supposed to go under the muscle. Usually she feels it go into her muscle and she gets a bit of a sore arm-no big deal. Then about twelve hours later on the money every time, she has gotten violent chills that last about another 12 hours or so. Caller got all the vaccine from Pfizer and flu shot but not on the same time. One for her flu shot and she got the covid vaccine but not on the same time. there might be a drug interaction and another one for latest shot she got because she didnt even feel that the vaccine went through her skin. The vaccine was given to her under the skin and not in the muscle. Caller doesn't get this vaccine with the flu vaccine. She separates it because she has got really bad chills when she gets this vaccine so far, within 12 hours. Her plan was to repeat it in the fall. She got it under the skin instead of the muscle.  The information on the batch/lot number for bnt162b2 omi xbb.1.5 has been requested and will be submitted if and when received.