In a model that included heart failure, nephropathy, COVID-19 vaccination, age, bilateral pneumonia, SARS-CoV-2 infection, and CRP, systolic blood pressure and white blood cell count as continuous variables, nephropathy (OR 95%CI: 3.649, 1.422–9.367; p = 0.007), not being vaccinated for COVID-19 (OR 95%CI: 0.160, 0.055–0.471; p < 0.001), SARS-CoV-2 infection (OR 95%CI: 2.390, 1.165–4.902; p = 0.017), and lower blood pressure at admission (OR 95%CI: 0.980, 0.967–0.995; p = 0.007) were independent risk factors for coinfection (Models A, B, and C in Table 3). This evidence concerns the gene CRP and susceptibility to pneumonia measurement.