This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). A male patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) as dose 1, single for Covid-19 immunisation. Relevant medical history included: "diabetic" (unspecified if ongoing), notes: he got diabetic; "heavy" (unspecified if ongoing), notes: he got heavy. The patient's concomitant medications were not reported. The following information was reported: NATURAL KILLER T CELL COUNT INCREASED (non-serious), outcome "unknown", described as "Those were the t-cells that attack and rebuild the tissue like a pimple or strain your ankle or something". Relevant laboratory tests and procedures are available in the appropriate section. Additional information: After his first shot of the Pfizer vaccine those numbers moved and what numbers moved. Those were the t-cells that attack and rebuild the tissue like a pimple or strain your ankle or something. After taking your medication it caused to him great harm and what is it causing great harm with. Those cells that attack your stuff are super high. Reporter stated, well, he just watched the video of a Doctor who took a patient that did not had the first shot yet, that he normally sees and this patient had just gotten over a, well he just had a bad overall health and he did not taken care of himself, he got heavy and he got diabetic and stuff like that. He had worked really hard, he lost 70 pounds and he got all his numbers back in the middle, back where it should be, normal and after his first shot of the Pfizer vaccine. Hence, captured as unspecified product those numbers moved and what numbers moved. Those were the T-cells that attack and rebuild tissue, like a pimple or strain your ankle or something, that type of cell. The autoimmune system, these are HIV AIDS test that they gave him. It is basically testing your immunity, doctor's take them all the time if you know about doctors. They keep their eyes and ears on health all the time. They check their thyroid more than anybody else will ever check their thyroid and they regulate it. They make sure that everything is regulated on themselves and this guy is just trying to help this other guy, do the same thing. So, he said before you go in there let's do a blood panel on you and he said okay. He said you do not have to pay for it. I will pay for everything. You do not have to turn it in on your insurance. So, he said OKAY. So, he did a blood panel and of course everything comes up normal because they just did it one only a month before this and he came out fine on that. So, he did the whole thing again, they did the whole thing over again but this time he did it in depth like he would do aged and they checked everything. Each and every kind of cell they got in body was checked and what it did say about it was, it came back and it said that after taking your medication it caused to him great harm and what is it causing great harm with. Those cells that attack your stuff are super high. Reporter hung up abruptly. Reporter call back was performed to gather further Information but was unsuccessful. Thus, further probing could not be done. Hence, limited information available. No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected. Follow-up (18Oct2021): This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.