The vetting will go beyond student applicants and includes faculty, employees, contractors, guest speakers and tourists, according to the cable seen by NBC News.

Exposure to wildfire smoke may increase lung cancer patients' risk of dying from their disease, particularly among non-smokers, but the effect may be mitigated by certain cancer treatments, according to a large California study presented at a major medical meeting on Saturday.

US consulates are carrying out enhanced social media vetting of Harvard applicants, in a pilot project that could be rolled out nationwide.