Applications are being accepted for the NIH Summer Internship Program:
https://www.training.nih.gov/programs/sip
Summer programs at the National Institutes of Health (NIH) provide an opportunity to spend a summer working at the NIH side-by-side with some of the leading scientists in the world, in an environment devoted exclusively to biomedical research. The NIH consists of the 240-bed Mark O. Hatfield Clinical Research Center and more than 1200 laboratories/research projects located on the main campus in Bethesda, MD, and the surrounding area as well as in Baltimore and Frederick, MD; Research Triangle Park, NC; Hamilton, MT; Framingham, MA; Phoenix, AZ; and Detroit, MI. NOTE: the number of positions in Hamilton, Framingham, Phoenix, and Detroit is limited.
Internships cover a minimum of eight weeks, with students generally arriving at the NIH in May or June. The NIH Institutes and the Office of Intramural Training & Education sponsor a wide range of summer activities including lectures featuring distinguished NIH investigators, career/professional development workshops, and Summer Poster Day.
Computational, mathematical, and data science applicants are welcome and encouraged.
So this is applicable only to U.S citizens, please correct me if I am wrong. Non-US candidates performing research outside of U.S are not eligible to apply right?
Eligibility criteria are here: https://www2.training.nih.gov/apps/publicforms/sip/forms/sipapp.aspx . In short, I think your comment is correct. Also, note that this is not a "grant"; this is an internship that happens on one of the NIH intramural campuses (the largest is in Bethesda, MD, USA).