In what may prove to be a major advance for Africa's "meningitis belt," regulatory authorities have decided that a new meningitis vaccine could be stored without refrigeration for up to four days.
The announcement was made last week at a conference in Atlanta of the American Society of Tropical Medicine and Hygiene. While a few days may seem trivial, the hardest part of protecting poor countries is often keeping a vaccine cold while moving it from electrified cities to villages with no power. In antipolio drives, for example, the freezers, generators and fuel needed to make ice for the shoulder bags of vaccinators can cost more than the vaccine.
The new vaccine, MenAfriVac, made in India for 50 cents a dose, was introduced in 2010. In bad years, epidemics during the hot harmattan winds have killed as many as 25,000 Africans and disabled 50,000 more. In Chad this year, vaccination drove down cases to near zero in districts where it was used, while others nearby had serious outbreaks.
Experts decided that the vaccine is safe for four days as long as it stays below 104 degrees.
While temperatures get higher than that in Africa, said Dr. Godwin Enwere, medical director for the Meningitis Vaccine Project, teams normally get the vaccine out of coolers at dawn, drive to villages and finish before the day heats up. Other experts said it should be kept in the shade and monitored with colored paper "dots" that darken after hours in the heat.
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