Local health officials are urging residents to continue to guard against mosquito-borne West Nile virus even as cooler fall weather is slowly beginning to arrive.

Former NIAID Director Anthony Fauci urged international cooperation for West Nile virus vaccine development following his "terrifying" infection.

A San Fernando Valley resident died from West Nile virus, marking the first death from the mosquito-borne illness reported in Los Angeles County this year.

Although mosquitos might not be flying around right now, West Nile virus peaks at the end of the summer and early fall. Spread through mosquito bites, symptoms can range from a mild headache to disorientation.

Dr. Anthony Fauci, former director of the National Institute of Allergy and Infectious Diseases, joins MSNBC’s Lawrence O’Donnell to explain his recovery from West Nile virus and the “frightening” scenario that no treatment or vaccine exists to combat the virus.

Former White House chief medical adviser Anthony Fauci said he feared he would never “return to normal” after he contracted West Nile virus. Fauci, who served as the face of the Trump and Biden administration responses to the COVID-19 pandemic and served as the director of the National Institute of Allergy and Infectious Diseases