The statistical POV
http://www.nationmaster.com/graph-T/hea_obe
Statistically it is shown that over 30% of the Population is obese and accordingly in that same year *(2000) America had topped the world list of deaths by obese related causes , and this isn't the least of it , at the moment obesity is ever becoming more prevalent in our country . Heart Disease is a major cause contributing to these deaths and one of the most in demanding organs . . . . . .
(I think 30%> obesity is enough to make a strong point for heart disease related causes .)
Then you could probaly argument from the fact that society and it's contribution to the population becoming more vulnerable to health risks is a result of the lack of education to encourage people becoming healthier .
The same thing can goto smoking related causes , it's not the peoples fault for why they are addicted and why they have lung problems . . . .
Basically try and make it not look like the people are responsible for organ problems .
Then point some fingers as to the reasons why , lack of education the fast foods and governments are providing about heart disease , an addictive drug that destroys peoples lungs & kills people being sold to the public , and state that society needs to be doing more to help the public become more healthier than acting or deliberating out against them .
If anyone basically mentions the sick don't deserve to be treated equally as anyone else , then a strong rebuttle would be to raise is the oath of hippocrates
(basically , no matter who the person is or what they have done , the sick need help , as it would be a violation or compromise of professional integrity ( and to the oath of hippocrates) to deliberate a moral judgement against a person who is sick )
http://www.med.umich.edu/irbmed/ethics/hippocratic/hippocratic.html
This is just a suggestion with some ideas which maybe viable to your support