Background The presence of comorbidity poses a major clinical challenge in the care and treatment of COVID-19 patients. Moreover, having one or more comorbidities could be a life-threatening situation in COVID-19 patients. Cancer is substantially associated with significant morbidity and mortality in COVID-19 patients. However, there is not sufficient data to conclude that cancer patients have a higher risk of COVID-19 infection. In this study, we reviewed cancer comorbidity and risk of mechanical ventilation or death in patients with confirmed COVID-19. Methods A comprehensive systematic search was performed on PubMed, Scopus, Web of Science, SciELO, and CNKI, to find articles published until August 01, 2020. All relevant case series, case reports, systematic and narrative reviews, meta-analyses, and prospective and retrospective studies that reported clinical characteristics and epidemiological information of cancer patients infected with COVID-19 were included in the study. Results A total of 12 cohort studies exclusively on cancer patients with confirmed COVID-19 were selected. Conclusions According to the findings of this study, cancer was not among the most prevalent underlying diseases in patients with confirmed COVID-19. Moreover, cancer patients infected with COVID-19 had the lowest risk of mechanical ventilation or death than the non-cancer infected patients.

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Cervical cancer is the second most commonly diagnosed malignancy and third leading cause of cancer-related mortality among women in less developed countries (Karimi Zarchi et al., 2010; Mousavi et al., 2008). According to GLOBOCAN, cervical cancer accounts for 528,000 new cases and 266,000 deaths worldwide in 2012 (Parkin et al., 2005). Although, it has been widely accepted for several decades that Human papillomavirus (HPV) is the main risk factor for development of cervical cancer (Behtash et al., 2009; Farbod et al., 2019; Ghaemmaghami et al., 2008), HPV infections have developed to persistent infection in only a very few cases and it is sufficient to induce cervical cancer in an even smaller proportion

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