If you follow the media reports then according to the media reports published there is over 15 lakh students registered for NEET 2019 exam so the number is quite large and if compared with Engineering entrance exam such as JEE main  where the registration is more than just 10 lakh so there is greater Craze for medicine.

Hiii

The exact number is yet not out, it will be published on the official website soon. As of now the expected number of students is around 12 lakh students this year.
But the exact number can not be predicted. Stay connected to the official website for updates about the exam.

Thanks!!