Hundreds of Mexicans pray the Virgin of Guadalupe for Pope Francis' health, a day after the Vatican warned the 88-year-old's condition was "critical". "I come to ask the Virgin of Guadalupe to grant Pope Francis health and pray for him for all the good he has done for us during his papacy," says 32-year-old Cynthia Berenice Martinez, as Catholics around the world pray for the pontiff's recovery. IMAGES AND SOUNDBITES