A priori, the Israeli RNA-based vaccination has several potential risks. Vaccination works as a prophylactic. Vaccination of individuals while they are exposed to a pandemic has several adverse consequences.
1. Vaccination processes usually imply temporary immune system weakening, before vaccine-induced immunity is acquired. Hence, the vaccinated are fragilized during the vaccination process, and more likely to develop any diseases against which the immune system usually defends the body. This includes any viral and bacterial infections, and individual cancer cells that would escape extermination by the immune system during this vaccination-induced weakened period. This could cause cancer in the medium- or long-term.
2. In the long-term, the antibodies induced by the RNA vaccine will cause autoimmune reactions to the cells producing the viral protein encoded by the vaccine RNA, and to cells with natural human proteins resembling the viral protein encoded by the vaccine RNA.
3. Massive vaccination might select vaccine-resistant viral variants with likely catastrophic effects, especially on the vaccinated.
4. RNA from the vaccine will in some cases integrate chromosomes of the vaccinated, with potentially harmful consequences difficult to evaluate at this point. Any claim to the contrary is misleading and misinformed. Human chromosomes integrated genomes of retroviruses that include RNA->DNA reverse transcriptase genes. This was the topic of the 1976 Nobel prize in Physiology and could not be ignored by competent professionals.