The World Health Organization reports that more than 70 countries have reported cases of Zika infection. As a public policy expert, you record and publish this information. In addition, part of your job is to create effective strategies that can be implemented to minimize disease outbreak.

If the number of cases reported doubled in three months, what is the best immediate action to recommend?

A. Surveying and reporting the number of Zika-related cases
B. Distributing mosquito spray at future local health fairs
C. Instituting a public ban on traveling to and from Zika-prone countries
D. Instructing doctors to tell every patient not to travel