White hairs occurring due to vitiligo is difficult to treat, since the pigment cells in the hair follicles are most resistant to disease therefore involvement of hairs indicates a poor outcome.
According to your history, FUE was done 35 days ago, so please wait for at least 4-5 months to assess the results of the procedure, as each hair cycle takes a minimum of 3 months to complete.
Next Steps
Wait for 4-5 months to check outcome of FUE.
Health Tips
If after 4-5 months, you are not happy with the outcome of hair transplant, you can consider colouring the affected hairs to minimize the contrast.