Who was Dr. Jonas Salk?

Jonas Edward Salk was an American virologist and medical researcher who developed one of the first successful polio vaccines.

Salk, born in New York City in 1914, first conducted research on viruses in the 1930s when he was a medical student at New York University, and during World War II helped develop flu vaccines.

that’s true, tatiana prouskouriakoff established that the inscriptions were primarily historical.   they recorded events in the lives of mayan rulers and their families.

the answer to your question is true

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