When the citizen with comorbidity has to register, it’s not necessary to upload any documents. If the person’s age is between 45 and 59 years, then he or she can register only after confirming the comorbidity conditions.   In addition, you have to carry a medical certificate from a doctor when the person takes the vaccine. Post verifying the medical certificate, it will get uploaded at the vaccination centre. However, in India, individuals over 18 years of age must take the vaccination doses.