They certainly do. But asthma sufferers or those who have repritory issues and/ or are immunocompromised make up a slim portion of the population. In in order of frequency, weight and cardiovascular issues are #1 and 2 so there is loads of data.
Many other conditions can be a nightmare too, like Cystic Fibrosis, COPD, emphysema etc, but occur at such a rare rate that it’s insignificant to the general population. Obesity on the other hand affects 42% of folks in the Us. Whether or not the other conditions that come with it have appeared yet, it only takes one organ to shut down when sick. If they are already all working overtime to keep up, one’s survival odds are decreased.
Type 2 diabetes fits a similar frequency. 1 in 10 Americans has it, but if you remove the younger population it’s many times more of those 40+.