Oops bad punctuation - I should have had a colon. The text after the > is cut and paste from the article. From wikipedia "fourth dose extends the protection for

Oops bad punctuation - I should have had a colon. The text after the > is cut and paste from the article. From wikipedia "fourth dose extends the protection for another 1–2 years. The vaccine reduces hospital admissions from severe malaria by around 30%" So it's a helps a bit situation rather than just vaccinate everyone and malaria is over.