The real reason polio is so dangerous

0:00 / 0:00
John
angleščina
Študenti
Jedrnato
Naj vaš video izstopa v nekaj sekundah. Prilagodite glas, jezik, slog in občinstvo točno tako, kot želite!
Povzetek
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.
Podnapisi
Priporočeni posnetki
02:23
BEST ROCK SONGS ON PIANO
01:03
MASSIVE ANNOUNCEMENT!
0:41
An Introduction to Early Music Instruments, Part 2 of 2 - The Dulcian, and Thoughts on Early Music
02:44
2026 Tesla Semi Price Finally Revealed, Up 60%! Affordable Or Expensive?
02:23
How We Make Our Deadly Traps
02:19
This Fortnite Kid Is BETTER Than Clix
02:32
World's Biggest Engines
02:25
Marvel Rivals Season 2 is HERE !
05:19
Tesla Bot Gen 3 Will Sell Out By 2026 For Its HUGE Useful Tasks! Elon Musk Has Announced!
01:10
Waterless Farming In China - Grow Plants In Deserts Using Paper Embedded Seeds Without Water
09:35
[NoZoom] The Boondocks Full Episode Season 2025 🔥☑️ #NoZoom #1080P #FullHD #NoCuts
04:25
A CONSTRUÇÃO do Terceiro Templo começa AGORA com a CHEGADA da Novilha Vermelha