Zydus Lifesciences on Wednesday said it is introducing a vaccine for protection against new strain of influenza virus. The company is introducing country's first flu protection quadrivalent influenza virus vaccine as per WHO recommended composition, the Ahmedabad-based drug major said in a statement. Zydus's Quadrivalent Inactivated Influenza vaccine VaxiFlu-4 will offer seasonal protection against four new virus strains, it added. A quadrivalent vaccine, by covering strains of both influenza A and influenza B, provides a broader protection and significantly reduces the risk of vaccine mismatch, it said. The vaccine has been cleared by the Central Drug Laboratory (CDL), the drug maker said. "Preventives are the key to public health in both the developing and the developed world and vaccines have the potential to improve the quality of life," Zydus Lifesciences Managing Director Sharvil Patel said. In India, there is a pressing need for access to affordable, high-quality vaccines