 (4) Although the number of reported cases is lower than the actual number of cases, a high spatial correlation exists between the cumulatively reported cases and healthcare worker cases.
<fluency>  (4) Although the number of reported cases is lower than the actual number of cases, a high spatial correlation exists between the cumulatively reported cases and healthcare worker cases.
 (4) Although the number of reported cases was lower than the actual number of cases, a high spatial correlation exists between the cumulatively reported cases and healthcare worker cases.