EVEN BEFORE THEY GOT ENGAGED, fashion designer Carly Cushnie and Oscar Cantú, a financial adviser, knew they wanted to get married in Mexico. “We didn’t want just any random beautiful place; it had to mean something to us,” says Carly, of the Cushnie et Ochs label. At first, the New York–based couple chose Oaxaca, on the country’s southern coast, for its cuisine and artsy vibe, but then in spring 2016, the Zika virus broke out. “We worried our friends would opt out, and we didn’t want to have a wedding without them there,” she says. They changed their location to Mexico City, where Oscar’s dad grew up—and virus-carrying mosquitoes usually don’t live at that altitude. On February 24, 2017, Carly and Oscar exchanged vows in a traditional Catholic ceremony led…
