Research suggests that individuals with O+ blood type may possess a stronger immune system, exhibiting a more robust response to infections and potentially a lower risk of diseases like heart disease. Studies indicate O+ individuals might also respond better to vaccines and harbor a beneficial microbiome, further contributing to enhanced immunity. Research suggests that individuals with O+ blood type may possess a stronger immune system, exhibiting a more robust response to infections and potentially a lower risk of diseases like heart disease. Studies indicate O+ individuals might also respond better to vaccines and harbor a beneficial microbiome, further contributing to enhanced immunity. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle