Co-WIN has developed a new Application programming interface called 'Know Your Customer's or Client's Vaccination Status – KYC-VS. This will enable entities to check an individual's status of vaccination through CoWIN.<br />''<br />'' To use this API, an individual needs to enter his or her mobile number and name. Thereafter, they will get an OTP which they have to enter. In return, Co-WIN will send a response to the verifying entity on the individual's status of vaccination. If the response of Co-WIN – 0 – means Person is not vaccinated, 1 – Person is partially vaccinated and 2 – Person is fully vaccinated. This response will be digitally signed and can be shared instantly with the verifying entity.