This is highly speculative and should not be taken as fact. Amazing advances in brain therapy . They are trying to find the natural reservoir and develop a vaccine. The CDC has an update on the Nipah virus investigation. Here is a figure from the report showing the number of infections.
Molecular probes detect a toxic algae .
Polio can still be a problem in some countries. A civil war is ongoing in Angola and this contributed to the poor vaccination of infants. The ethics of transplants . Destroying the small pox virus, or not. Working on a farm is dangerous for children.