The OPK uses disposable blood sampling instruments, so the probability of contracting an infection tends to zero. Although hospitals in small towns are underfunded, so they can reuse instruments.
The only thing a donor needs to worry about is iron deficiency anemia, so it is recommended to increase the amount of foods containing iron in the diet.
Honestly, I don't know where such stories can be heard in our time. I propose to sort it out in order.
Let's start with the donor itself. Firstly, in order to protect him from diseases, everything happens according to the standards of blood sampling: completely disposable equipment, treatment of the place of blood sampling with alcohol, gloves on the hands of medical personnel. Well, plus the hygiene itself at blood transfusion points, for example, in the place where I donate blood, I need to put on a second pair of shoe covers before donating.
Now let's turn to the recipient. If you think that blood that someone donated is immediately transfused to those in need, you are mistaken. It starts still at the blood donation point. Before each blood donation, each donor must donate blood from a finger for tests, both general (hemoglobin, etc.) and for the most common diseases (AIDS, hepatitis, syphilis, ...) plus a mandatory interview-examination with a doctor- transfusiologist. Then, at the time of donation, a small portion of blood is taken from the patient from the vein for further, more in-depth analysis. And the blood that he donated is purified and the period of conservation is sure to pass.
In addition, there are different types of donors - the so-called reserve donors and personnel donors. With the first, everything is clear - they donate blood, and then it is used, roughly speaking, as a last resort. To become a cadre donor, you must provide a lot of tests, as well as, before each blood donation, bring a certificate from an infectious disease specialist about the absence of contact with infectious patients.
Thus, donating blood at state blood transfusion points, get infected with something or infect someone -or almost impossible
I'll throw in one more story. I have a rare blood type, Rh negative, they often called from the SPK and asked to donate blood, I donated, then an operation (appendictomy), a year off, and then I was asked to donate blood for a specific person, which I was going to do, but they told me " Sorry, the bodies of hypatitis B were found in your blood, you were suspended from donation for life, all your blood from the reserves was destroyed, goodbye. " At the same time, no one wanted to inform, until I myself came to the blood donation point that such a virus had been detected at all (neither the local doctor, nor the infectious disease specialist). that is, you can be a carrier, but not know about it.
After that, a nurse working at this station told me a cool story that people often get infected just when donating blood, from badly disinfected needles, glasses with tea (if there are wounds in the mouth), etc. so, there are no recommendations here, the only thing we can hope is that in the capitals at the stations they monitor the instruments better than in provincial cities, although the sanitary standards are the same everywhere. By the way, I did not have any virus, no antibodies were found. Anyway, thank you for even hypatitis B, this is not a sentence, but there have been worse cases.