what different operations it has done in the past?
An epidemiological information service via telex, a mass tuberculosis inoculation drive using the BCG vaccine , the malaria eradication programme
World Health Organization
: The WHO established an epidemiological information service via telex, and by 1950 a mass tuberculosis inoculation drive using the BCG vaccine was under way.

1955: The malaria eradication programme
plane crash off the coast of nova scotia Swissair Flight 111 when was it built? 1991 who made it? UNANSWERABLE when did it crash? 2 September 1998 how? It crashed into the Atlantic Ocean southwest of Halifax Stanfield International Airport at the entrance to St. Margarets Bay, Nova Scotia. who were the victims of it? There were 132 Americans, 41 Swiss and from different parts of the world. Jonathan Mann, former head of the World Health Organization's AIDS program, and his wife, AIDS researcher Mary Lou Clements-Mann, died in the crash. what is the organization you mentioned about? It is a specialized agency of the United Nations responsible for international public health. when was it established? The WHO was established by constitution on 7 April 1948, which is commemorated as World Health Day.
wiki:19672133
World Health Organization [SEP] Operational history of WHO
1947: The WHO established an epidemiological information service via telex, and by 1950 a mass tuberculosis inoculation drive using the BCG vaccine was under way. 1955: The malaria eradication programme was launched, although it was later altered in objective. 1955 saw the first report on diabetes mellitus and the creation of the International Agency for Research on Cancer. 1958: Viktor Zhdanov, Deputy Minister of Health for the USSR, called on the World Health Assembly to undertake a global initiative to eradicate smallpox, resulting in Resolution WHA11.54. At this point, 2 million people were dying from smallpox every year.