Film producer Sajid Nadiadwala recently held a vaccination drive for over 500 employees and their families, his spokesperson said on Tuesday. The vaccination drive was held on Monday and the employees mainly belonged to the crew of Nadiadwala's upcoming movies -- Tiger Shroff's "Heropanti 2", Akshay Kumar-starrer "Bachchan Pandey", Salman Khan-fronted "Kabhi Eid Kabhi Diwali" and "Tadap", featuring Ahan Shetty …