If one of your friends sick and is asking for some advice, here is a sample template you can use to write an advice letter to a sick friend.
I am writing this to inform you that I got to know about your health. I am extremely sorry to hear that you had to go through all of this. I was informed that you [enter topic/sickness/surgery]. I would like to advise that you should [enter advice] and take care of your health.
I understand that these are testing times, but I assure you that it will be alright soon. I pray for your speedy recovery and healthy life ahead.
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