Abstract
Past years were very important for human civilization and lesson learning. During the pandemic, our human civilization has witnessed a massive change in lifestyle which has created a disruptive impact on physical as well as mental well-being. As every situation in our lives may be treated as either a reward or a lesson, we can learn the importance of immunity to fight against any disease. According to recent studies on COVID, it has been observed that the mortality rate of COVID patients is varying along with different comorbidities like hypertension, diabetes, COPD, cancer, and any lung-related disease. The after-effect for patients with comorbidity issues is also much higher than for patients with zero comorbidity issues. A systematic review has been performed to analyze the effect of comorbidity issues on COVID patients compared to general conditions. In this review, we have covered three major comorbid diseases—diabetes, COPD, and any incurable disease like cancer or HIV. We have selected several peer-reviewed articles from some popular databases such as PubMed, BMJ, Google Scholar, and Lancet and focused and performed a meta-analysis based on several comorbidity factors and risks associated with that.
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