JMA Journal

Figure 1. Flowchart of the article selection process.

Figure 2. Risk ratios for seroconversion among patients with hematological malignancies compared with healthy controls after the first dose of the COVID-19 vaccine.

Figure 3. Risk ratios for seroconversion among patients with hematological malignancies compared with healthy controls after the second dose of the COVID-19 vaccine.

Figure 4. Funnel plot of the results for the first and second vaccine doses.