The country’s fight against AIDS starts with the basics: knowing you have it.

Nigeria was a battleground only two years ago. It had just over 3 million people with HIV, second in the world only to South Africa. Roughly 8 percent of all the HIV-positive people in the world lived in Nigeria, which has less than 3 percent of the world’s overall population. Now, thanks to a variety of efforts, the HIV prevalence in Nigerian adults has dropped by 40 percent since 2017.

When Petya Kertikova picks up trash on the street and throws it into the bin, people stare at the woman whose face they recognize from TV. “They think I’m crazy,” she says. Two years ago, the 30-year-old left Chicago to return to her native Bulgaria, the poorest member of the European Union. Her homecoming is all about improving the country any way she can — a mission that extends from rubbish to the nation’s TV screens. Kertikova is the creator of The Returnees, a TV show featuring the stories of successful Bulgarians who lived abroad but returned home to make a difference. People like her.

OZY Fest means New York, and it means comedy. Which means it’s the perfect event to catch three of the funniest comedians on New York–based The Daily Show With Trevor Noah. Anchoring this year’s all-star OZY Fest comedy lineup are Daily Show host Trevor Noah and correspondents Dulcé Sloan and Ronny Chieng, who, along with itinerant funnyman Tom Rhodes, promise to light up Central Park’s Great Lawn with laughter. But not all of these popular entertainers expected to end up on a stage.