Despite the ineffectiveness of entry and exit screening measures, authors reported several important concomitant positive effects that their impact is difficult to assess, including discouraging travel of ill persons, raising awareness, and educating the traveling public and maintaining operation of flights from/to the affected areas. (PubMed)

Entry screening, done on arrival at the destination airport, can be an opportunity to gather contact information that is useful if it turns out an infection did spread during a flight and to give travelers guidance on what to do if they become ill. (Science mag)

Entry screening is part of a layered approach used with other public health measures already in place to detect arriving travelers who are sick (such as detection and reporting of ill travelers by airlines during travel and referral of ill travelers arriving at a US port of entry by CBP) to slow and reduce the spread of any disease into the United States. (Centers for Disease Control)