Medical technology has developed rapidly due to the communication. If there is a new disease occurs, it causes the doctor invented medications quickly. As a result, the population does not fall as much in the past, or death.
Medical technology has developed rapidly since the communication more convenient. If there are new diseases occur. It makes doctors invent medicines quickly. Do not result in death or falling population as much as in the past.
Medical technology has developed rapidly since communication more convenient to have the disease occurs, it makes the new doctor invented the medicine quickly. Don't result in a population collapse or death as much as in the past.