UN and Western countries covered up the facts on the huge health toll of Chernobyl radiation

Soviet doctors treating Chernobyl-exposed suddenly had an unwelcome crash
course in this medical problem. They found that radioactive contaminants,
even at relatively low levels, infiltrated the bodies of their patients,
who grew sicker each year. Gradually, health officials understood they had
a public health disaster on their hands. Thousands of archival records
document the catastrophe. Ukrainian doctors registered in the most
contaminated regions of Kiev province an increase between 1985 and 1988 in
thyroid and heart disease, endocrine and GI tract disorders, anaemia and
other maladies of the blood-forming system.