Yes, candidates can study MBBS in Russia after completion of their 12th. However, candidates must fulfil the following eligibility criteria for applying to MBBS in various Russian medical colleges:

• Students must have a high school diploma with a minimum of 50% in Physics, Chemistry, and Biology subjects. 

• Completion of National Eligibility cum Entrance Test or NEET exam.

• Candidates must be of 17 years old on or before December 31st of the year of admission.

• Students must have certificates in English language proficiency tests like IELTS or TOEFL.