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Large-scale pilot for new malaria vaccine begins in Malawi
Trials show that nearly 40% of the 5-to-17-month-olds who received it were protected
'World's first malaria vaccine' is being rolled out in Malawi
The vaccine trains the immune system to attack the malaria parasite
Police detain 40 suspects in Sri Lanka
Sri Lanka's government has blamed the blasts on a local Islamist group
Sri Lanka says Islamist group is behind Sunday's attacks
Explosions in churches and hotels killed 310 people and wounded nearly 500
Sri Lanka begins day of mourning for Easter Sunday victims
Nation in state of emergency as funeral services for victims begin
At least 290 people have been killed in Sri Lanka
All of the attacks were carried out by suicide bombers
Sri Lanka attacks: Police say they've now arrested 24 suspects
About 500 people were injured in the Easter Sunday bombings
Sri Lanka Easter Sunday attacks death toll rises to 290
About 500 people were injured
24 suspects arrested in Sri Lanka after bomb blasts kills hundreds
The attacks are the deadliest seen in the country since the end of the civil war in 2009
Sri Lanka's PM questions why attack warnings were ignored
More than 200 people were killed and hundreds more injured in a series of bomb attacks
