Ben Giourmetakis, Cassandra Csizmadia, their 16-month-old son and three other family members stayed at the Memories Varadero resort in Cuba between Jan. 9 and 16, 2016. They booked the holiday through Sunwing Vacations.

A growing number of Sunwing Vacations customers are stepping forward to say they got seriously ill on trips booked with the Toronto-based tour operator in recent months.