PUERTO VALLARTA, Mexico — During a visit to San Diego in April, Pratik and Priti Chavda thought they'd slip over the border into Tijuana just to do a little shopping, have a quick meal and say they had made it to Mexico. But upon hearing the plan, staffers at their hotel sounded the alarm.

"Swine flu! Drug cartels! Don't go!" Pratik Chavda, 32, recalls them warning.

Six months later, the Chicago couple have finally made it south of the border, where they're enjoying a meal of grilled shrimp with a panoramic view of a golden sunset. And they didn't even have to wait for a table.

What started out as a gangbuster year, with international tourist arrivals up about 6% in the first quarter, came to a screeching halt in late April when Mexico became the first to report an outbreak of the H1N1 virus. The flu scare, coupled with news accounts of gruesome drug-related violence, caused visitors to stay away in droves. From April to June, tourist arrivals plummeted by more than 19% over the previous year.