two days later, he attended his wife's memorial service at green hills baptist church in la habra. . . tusk made his remarks about the u.s. president's reliability before he chaired a meeting in bulgaria of the 28 leaders whose countries make up the world's biggest trading bloc. . and prevention says hepatitis a is a vaccine-preventable, communicable disease of the liver caused by a virus. it is usually transmitted person-to-person or by consuming .