Los Angeles [US], August 5 (ANI): Hollywood star Zac Efron was recently admitted to the hospital after getting involved in a minor swimming incident. The update left his fans extremely worried. The ‘High School Musical’ actor is now doing fine, as he took to Instagram and shared a photograph in which he could be seen lifting weights while lying on top of an exercise ball. “Happy and healthy,” he captioned the post. Zac also thanked everyone for their well wishes. “Thanks for the well wishes,” he added. As per PEOPLE magazine, on August 2, Zac was staying at a villa in Ibiza when he had a “mino…