Company name
Company Address
Dear Mr. / Ms. / Mrs. ………..,
Thank you for taking the time out of your busy schedule to visit me in hospital during my sickness.
It is gestures like yours which helped to give me the strength to recover soon, and I really felt blessed seeing your friendly & familiar face there.
Thank you again, Mr. / Ms. / Mrs. ……………
Sincerely,
[Your Name]