The American development aid organisation USAID has developed a wearable patch with which it hopes to contain the spread of Ebola. The patch monitors the patient’s heart rate, temperature, respiratory rate and movement patterns. The data is analysed and tracked by a central online platform, and if the readings divert from normal patterns, doctors are alerted immediately and can quickly treat the patient and get them into quarantine. The patch has an operational lifespan of 10 days and costs less than 100 dollars. It’s already been used in the United States and Sierra Leone on people who have had contact with Ebola-infected patients.