Confusion; Trouble with walking straight; Vertigo; Feeling tired; Chills and fever; Cas in like brain fog, where I can't think clearly and I was having a bit of confusion; I still had dizziness for a week.; Chills; I can't think clearly; This is a spontaneous report received from a contactable consumer or other non-health care professional (Patient). A 24-years-old female patient received first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Batch/Lot Number: EW0173), 1 via an unspecified route of administration, administered in Arm Left on 30Jun2021 (at the age of 24-years-old) as dose 1, single for covid-19 immunisation. Medical history included asthma. The patient's concomitant medications included, fluticasone propionate (FLOVENT), via an unspecified route of administration from an unspecified date (Batch/Lot number was not reported) to an unspecified date, at for an unspecified indication and it was like a steroid inhaler like I Quit taking after I got vaccine because I had feeling maybe that was why I was getting those such effects. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. On unknown date, she experienced confusion and trouble with walking straight and vertigo that lasted for 1 week. It was the first dose and I had got the shot I started feeling tired which was expected, I started having fever, chills and then I started feeling like a brain fog and I got a little bit of confusion and I began to dizzy and so, like I supposed it does not need to be in order but so I started out and felt tired which was expected and I started to get chills and fever, again kind of expected that, then I started to get, I was in like brain fog, where I can't think clearly and I had a bit of few visions and then I was having a lot of trouble in walking straight for 3 hour. That continued for few hours and then I still had dizziness for a week and now I feel fine, that was my experienced. The reason for transfer would be that the caller had very severe case of side effects after her first dose of COVID Vaccine 10 days ago and she was also trying to get the information as much as possible regarding what side effects are to be expecting from her second dose which was going to be soon. Consumer stated, I just want to make sure I did not had a reaction that I was not supposed to had and now like it was okay. I know you can not give medical advice probably but I just want to make sure it was safe for me to get second dose. Consumer was informed about the role of Pfizer drug Safety and also informed that Pfizer Medical Information was the right department answer the question consumer have regarding the vaccine and offered the number. Consumer stated, I experienced with first shot of Pfizer (Covid-19 Vaccine) and if it was different from anybody else got, I want to know that I am safe to get the second shot and I do not if someone had side effect like that or something. Patient received vaccination facility in: Consumer stated, It was like, made like a building inside of our shopping centre specifically for getting vaccinated but it was through the hospital. So, it was a walk-in clinic type of thing. Patient received treatment as Tylenol for fever, but other than that I think I just took some vitamins like zinc, vitamin C and vitamin D3. I did not get like any other treatment. The outcome of the events dizziness, vertigo, difficulty in walking, confusion was reported as recovered on unknown date and while for other event was unknown.   No follow-up attempts are possible. No further information is expected.