The Disease Prevention and Control Center has started the annual monitoring for flu and acute respiratory infections.
Early results of the monitoring show that three flu cases were reported by family physicians last week and two flu cases in the week before last.
The incidence of acute respiratory infections last week was 1,067 cases per 100,000 capita, which was a slight reduction compared to the week before.
Less than one percent of Latvia's population choose to vaccinate themselves against flu.