Gondolom a Marek betegségről olvasgatott, meg arról, hogy hogyan tenyésztenek ki veszélyesebb variánsokat a "szivárgó" oltások.
Innen: https://en.wikipedia.org/wiki/Marek%27s_disease
"Because vaccination does not prevent infection with the virus, Marek's is still transmissible from vaccinated flocks to other birds, including the wild bird population. The first Marek's disease vaccine was introduced in 1970. The disease would cause mild paralysis, with the only identifiable lesions being in neural tissue. Mortality of chickens infected with Marek's disease was quite low. Current strains of Marek virus, decades after the first vaccine was introduced, cause lymphoma formation throughout the chicken's body and mortality rates have reached 100% in unvaccinated chickens."
Szerintem egyáltalán nem alaptalan a félelem, hogy esetleg ezzel is hasonlóan járunk, mint a csirkék a Marekkel.