mildly fluey; Achy; she had diarrhea a little bit yesterday; My throat was parched after the vaccine; headache/My head hurts; tired a little bit; This is a spontaneous report received from a non-contactable reporter(s) (Consumer or other non HCP) from information team. The reporter is the patient.  An adult female patient received bnt162b2 (COMIRNATY), administration date 03Dec2021 (Batch/Lot number: unknown) as dose 1, single for covid-19 immunisation. Relevant medical history included: "Migraines" (unspecified if ongoing), notes: I get migraines but the headache isn't as bad as those. The patient's concomitant medications were not reported. Vaccination history included: Flu shot (Flu shot, experiencing very mild side effects like when she gets a flu shot. "mildly fluey; achy not any worse than that."), for Immunization, reaction(s): "mildly fluey", "Achy". The following information was reported: DIARRHOEA (non-serious) with onset 03Dec2021, outcome "unknown", described as "she had diarrhea a little bit yesterday"; HEADACHE (non-serious) with onset Dec2021, outcome "recovered" (Dec2021), described as "headache/My head hurts"; FATIGUE (non-serious) with onset Dec2021, outcome "unknown", described as "tired a little bit"; DRY THROAT (non-serious) with onset 03Dec2021, outcome "recovering", described as "My throat was parched after the vaccine"; INFLUENZA (non-serious) with onset 04Dec2021, outcome "unknown", described as "mildly fluey"; PAIN (non-serious) with onset 04Dec2021, outcome "unknown", described as "Achy". Therapeutic measures were taken as a result of diarrhoea, headache, dry throat.  Additional information: She wanted to know, "if one is fully protected after the 2nd dose is it. Her first dose was yesterday. Her arm doesn't even hurt today. She was taking Pedialyte and eating easy foods today and she was keeping her food down now. She also stated she had Day 2 headache in the morning. Took an aspirin and the headache went away. Pedialyte helped her. She felt so much better than even yesterday. She asked about Vaccine efficacy for the primary doses further out than 7 days from the 2nd dose. Analysis of 927 confirmed symptomatic cases of COVID-19 demonstrates BNT162b2 is highly effective with 91.3% vaccine efficacy observed against COVID-19, measured seven days through up to six months after the second dose. Myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the lining outside the heart) have occurred in some people who have received the vaccine, more commonly in males under 40 years of age than among females and older males. In most of these people, symptoms began within a few days following receipt of the second dose of vaccine. The chance of having this occur is very low. You should seek medical attention right away if you have any of the following symptoms after receiving the vaccine: Chest pain, Shortness of breath, Feelings of having a fast-beating, fluttering, or pounding heart. She asked about Vaccine efficacy for the primary doses from the clinical trials. She asked about Vaccine efficacy after the booster dose. If she experience covid symptoms, could she get monoclonal antibodies; were there any interactions?  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.