Today the New York attorney general Eric Schneiderman issued a warning about products that claim to prevent Zika. He threatened manufacturers that he would “shut them down,” calling the marketing of worthless products to concerned parents “absolutely shameless.”

He specifically called out products that are based in B vitamins and “essential oils,” along with those that emit ultrasound energy to purportedly deter mosquitoes (like the iGuard 2.0 Ultrasonic Insect Pest Repellant and STAR Ultrasonic Pest Repeller). These approaches are not supported by evidence or approved by the U.S. Centers for Disease Control and Prevention.

The weight of Schneiderman’s ire was focused on child-oriented products like the Wildheart Outdoors Natural Mosquito Repellent Bracelet and Kenza High Quality Zika Mosquito Repellent Smiley Patch. Even though it says “high quality” in the name.

Wildheart Outdoors Natural Mosquito Repellant (Amazon)

What is high quality, then?

Eliminating standing water in or near your home. Pants, sleeves, and mosquito nets are also effective. (Though, at this point, a lot of people need them more than Americans: In 2015, there were roughly 214 million malaria cases and an estimated 438,000 malaria deaths.)