NEET is the entrance examination for admission to MBBS,BDS, Ayush and Veterinary courses across India. And NEET is also mandatory to study MBBS/BDS abroad. Now if you want to study MBBS/BDS abroad then your NEET 2019 score can be used to get admission in Foreign Medical Universities because NEET score is valid for 3 years to obtain admission to MBBS/BDS abroad. But to study MBBS/BDS/Ayush or Veterinary courses in India, you cannot use your NEET 2019 score.  You have to appear fresh for NEET in 2020. This is because NEET score is valid for 1 year if you want to study MBBS/BDS/Ayush and Veterinary courses across India.