The World Health Organization (WHO) on Wednesday confirmed the first fatal case of human infection with a strain of bird flu known as H5N2 in Mexico. The 59-year-old man with multiple underlying medical conditions had been hospitalized in Mexico City after being infected with the H5N2 virus. He died on April 24 after developing a fever, shortness of breath, diarrhoea, nausea and general malaise, the WHO said in a statement on Wednesday. It is the first laboratory-confirmed case worldwide of human infection with the H5N2 strain of bird flu, also known as avian influenza. It is also the first kn…