What Can We Learn from the Early H1N1 Influenza Experience in Mexico?

Children and young adults have the highest incidence of infection, and elders have the highest mortality.

In April 2009, the Mexican Social Security Institute (IMSS) began active surveillance of influenza-like illness (ILI) and hospital mortality. These authors retrospectively analyzed surveillance data for 63,479 cases of ILI reported from April 28 to July 31, 2009; 17,239 patients underwent polymerase chain reaction testing, and 6945 had laboratory-confirmed influenza A (H1N1) virus infection.

Overall, cohorts from birth to age 29 years had higher incidences of ILI (range, 192–325 per 100,000 individuals) and confirmed influenza A (H1N1) virus (26–49/100,000) than older cohorts. Children younger than 1 year had the highest incidence (325/100,000) and hospital admission rate (7/100,000). H1N1 laboratory-confirmed mortality rates were 1.6% among…

Reviewing Author

Peggy Sue Weintrub, MD

What Can We Learn from the Early H1N1 Influenza Experience in Mexico?

Topics

Reviewing Author