The US has now identified 45 monkeypox cases scattered across 15 states and the District of Columbia, while the multinational outbreak has reached more than 1,300 confirmed cases from at least 31 countries. No deaths have been reported.

In a press briefing Friday, US health officials provided updates on efforts to halt the spread of the virus and dispel unfounded concerns that the virus is spreading through the air.

To date, no cases of airborne transmission have been reported in the outbreak, which has almost entirely been found spreading through sexual networks of men who have sex with men. Monkeypox may spread through large, short-range respiratory droplets, and health care providers are encouraged to mask and take other precautions during specific procedures, such as intubation. But the general potential for spread via smaller, long-range aerosols is more speculative and theoretical.