Some in-person instruction will be required to maintain a student visa, and universities must tell the US government of their plans to open by July 15.

The executive order introduces new measures to curb international competition for US jobs, including highly skilled positions in research and academia.

The closure of visa offices, travel and immigration restrictions, and general anxiety create barriers for the international graduate students and postdocs who play a huge role in research in the United States.

The case of a lieutenant in the Chinese army who studied physics at Boston University points to broader vulnerabilities in US academia, The Wall Street Journal reports.

Despite having valid visas to attend universities, more than a dozen would-be graduate students have been detained at the airport and sent back to Iran in recent months.

The fast-track Global Talent visa will have no cap on the number of researchers able to come to the UK.

Prime Minister Boris Johnson says the immigration program will help the nation remain a science superpower post-Brexit.

Individual researchers and science societies are finding solutions so colleagues around the globe can attend conferences, from remote presentations to relocating conferences.

The latest rejections of visa requests have scientists up in arms.