Just to alert you about the malaria issues.
Three of our staffs who went to Cambodia for field work are now admitted to hospital for malarial infection. Diagnosis is still on.
Two years back one of my good friends, Dr. Sophie Williams who suffered from Japanese Encephalities during her field work in China went into coma and is still partially paralysed. 
Take care, stay safe and stay healthy.
For precaution use antibiotics prescribed by doctor, keep your body covered during field work with long sleeve shirt and full trousers. Use anti-mosquito spray. Any sign of sickness must be reported to the nearest doctor.

No tension. Just take Chloroquine tablet once in a week when in field.