An Iranian scientist who was bound for Boston Saturday to begin working at a Harvard Medical School laboratory is among the people from predominantly Muslim countries who have been barred entry to the United States.

Samira Asgari, who holds a doctorate from the École Polytechnique Fédérale de Lausanne in Switzerland, posted a Twitter message at 10:35 a.m. announcing that she had been barred from boarding a flight to the United States because she’s Iranian.

She was stranded after President Donald Trump’s executive order Friday closed the nation’s borders to refugees and people from seven predominantly Muslim countries linked to concerns about terrorism. The lab is looking for cures to tuberculosis, Type 1 diabetes, and rheumatoid arthritis.


The order went into effect Friday night and affects Iran, Iraq, Libya, Somalia, Sudan, Syria, and Yemen.

Read the complete story at BostonGlobe.com.

Don’t have a Globe subscription? Boston.com readers get a 2-week free trial.