How good is Stevens Institute of Technology?

I got an admission in MS in Data Science in Stevens for this fall 2022. I am very confused whether to accept it or not.

Do Professional LOR’s require any stamp from the company?

Do we need to get the lor sealed / stamped or is it not required and can we submit a pdf?

How to find similar aspirants on Yocket?

Easily find similar aspirants on Yocket by using the Connect tool. To locate the Connect tool on the Mobile A

Are those who are vaccinated with Sputnik v are being allowed into US?

Hey guys, unfortunately I had two doses of Sputnik V last year, now I'm confused whether I'll be allowed into USA or not