Complex sentence: Recent publications indicate 39% to 58% of the general population are seropositive for antibodies to JCV, indicating current or previous infection with the virus; other publications put the percentage at 70% to 90% of the general population.
Split into simpler sentences: Recent publications indicate 39% to 58% of the general population are seropositive for antibodies to JCV, indicating current or previous infection with the virus. Other publications put the percentage at 70% to 90% of the general population.