Sickness is not considered as sin in any religion.
Calvinists believe sickness is a sign of gods displeasure with you for some sin
have to
uh... yeah I believe it depends on your religion. Many Christians believe it to be so, but Wiki Answers shouldn't be a place to judge religion. Religion is an opinion.
Belief in God is subjective and varies among individuals and cultures. Some religions may consider it a sin to not believe in God, while others may not. It ultimately depends on the beliefs and teachings of the specific religion in question.
Members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) do not believe that being human is a sin. They believe that sinning is knowingly disobeying God.
No, if you are a Christian, you believe God will forgive you of every sin you commit if you are willing to repent, confess your sin, and forsake the sin you committed. Allah has no part in the Christian religion.
Definitely. As physical poisons cause ill, so does spiritual perversion. Sin affects our body and soul simultaneously. Though in certain cases the illness causes by sin might not be noticed immediately, it, however, overcomes the sinner sooner or later.
I am unclear as to what the "reality of sin" is. Sin itself is a very real thing in almost every religion. The real questions what are: what forms does the sin take, what categories of sins are there, how do you commit sin, how do you repent from sin, what are the physical/social/psychological effects of sinning, etc.
Sometimes sickness is a punishment for sin (Psalms 38:4). Sometimes sickness is simply because of our own carelessness or foolishness (Proverbs 22:5 as interpreted in Talmud, Ketubot 30a). Sometimes sickness is a specific message from God. Sometimes sickness is a message from our body, that something needs repair. Sometimes sickness is to purify the soul.
Grieving the Holy Spirit is the only unforgiveable sin... Some people say that it is suicide? I believe this, but also believe that there are many things that grieve the Holy Spirit (makes him sad) ex. not listening to him when he tells you what to do.
Hindu's believe that bathing in this river will cure illnesses and your sin's can be forgiven.
It is not a sin to convert to Christianity.