Complex sentence: Srivastava received his PhD degree in biological science from Banaras Hindu University in 1977, followed by an MS in Computer Science from the Virginia Commonwealth University in 1987 and a MPH degree from the Johns Hopkins University in 1997.
Split into simpler sentences: Srivastava received his Ph.D. degree in biological science from Banaras Hindu University in 1977. Subsequently, he received his M.S. degree in Computer Science from the Virginia Commonwealth University in 1987 and a M.P.H degree from the Johns Hopkins University in 1997.