Several decades ago, in the field of medicine, it was discovered that the body can avoid certain illnesses if a person is vaccinated i.e. inoculated with a radically weakened strain of those diseases. Through this process, the body produces antibodies custom-made weapons to guard against the illness.
The principles of healing the body, according to Maimonides, apply equally to remedies of the soul.1This can provide us with a positive way of viewing minor difficulties in the execution of an important project. A weak dose of opposition early on in a venture can serve as a “vaccine” against more severe and difficult adversity later on.
Igros Kodesh of the Rebbe, Vol. 11, p. 58
"blood is the life" is Torah spoken.
First responsibility is for everyone to eat high vibration food God made, and lower intake of junk food Man made. This raises the immunity God gave us, and lowers
the "necessity" for vaccines. According to Beauchamp, the theory of germs causing disease is false. He theorized that the "terrain" of the human body is what causes disease,by being weak or strong (highly immune). That is why when many people are equally exposed to microbes, some get sick and some stay well.