There is increasing fear of Russia bombing health labs in Ukraine and the possibility of dangerous pathogens contaminating the environment.
US biotechnology company says it will permanently waive its Covid-19 vaccine patents for 92 low- and middle-income countries.
A joint effort will be required to overcome the potential spread of the pandemic on the African continent.
Research shows for the first time how measles – one of the world's most contagious diseases – erases the body's memory of previous pathogens, effectively wiping its immunity memory.
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