What is the difference between a higher-dose flu vaccine and 4-strain flu vaccine?

• Greater protection against the influenza virus up to 24.2% compared with standard dose of 4-strain flu vaccine
• Reduced hospitalization caused by heart and lung conditions by up to 17.9% compared with standard dose of 4-strain flu vaccine
• Minimized complications brought on by pneumonia up to 27.3% compared with standard dose of 4-strain flu vaccine

Higher-dose flu vaccine for the elderly aged 65+ (for 1 person)