Please tell which vaccine is better -COVAXIN OR COVISHIELD?

Please tell which vaccine is better -COVAXIN OR COVISHIELD ?? Please help i want my parents to be vaccinated

Covaxin

even if parents are on blood thinner and diabetic?

Diabetic Or anticoagulant drug are not contraindicated as per guidelines.

Can anyone suggest is their any contraindication in elderly with angioplasty done and also on treatment for Parkinson’s?

untill not immunocompromised… it can be given