The real reason polio is so dangerous

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John
अंग्रेज़ी
कॉलेज के छात्र
संक्षिप्त
अपने वीडियो को कुछ ही सेकंड में अलग बनाएं। आवाज़, भाषा, शैली, और दर्शकों को बिल्कुल वैसे ही समायोजित करें जैसे आप चाहते हैं!
सारांश
Polio was once a devastating virus, causing paralysis in many. Vaccines like IPV and OPV drastically reduced cases, but new vaccine-derived strains emerged due to under-vaccination. To combat this, researchers developed safer OPVs and used technology to ensure vaccination thresholds are met. The fight against polio continues, especially in conflict zones.
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