Malaria Making a Comeback? The Trap of Imported Cases

By Ana Espino | Published on April 21, 2026 | 4 min read


Malaria is a parasitic disease transmitted by mosquitoes of the Anopheles genus. Although many countries have succeeded in eliminating local transmission, these areas remain at risk of reintroduction, mainly through imported cases linked to population movements, international travel, or cross-border exchanges. This situation highlights the fragility of malaria elimination achievements.

Despite the progress made, several limitations persist, particularly in management and prevention strategies. Surveillance systems may lack sensitivity or responsiveness to detect imported cases early, especially when infections are asymptomatic or submicroscopic. Diagnostic tools, although effective, are not always deployed uniformly, and some preventive approaches such as chemoprophylaxis show variable effectiveness depending on the context. Moreover, treatment alone is not sufficient to prevent the reintroduction of the disease without a comprehensive, integrated approach.