By San José, Costa Rica — SAN JOSÉ – Health authorities in Costa Rica have officially confirmed the domestic circulation of a new influenza variant, prompting a renewed call for public vigilance and adherence to preventative health measures. The Ministry of Health announced that seven cases of the influenza A(H3N2) subclade K have been identified, all of which have presented with mild symptoms and have not required hospitalization.
The emergence of this variant in Costa Rica aligns with a broader global trend identified by the World Health Organization (WHO). According to the WHO, the 2025 influenza season began circulating earlier than is typical, with a sustained increase in cases reported worldwide since August. This global surge has been characterized by the detection of the A(H3N2) subclade K strain in numerous countries, signaling a shift in the virus’s behavior on an international scale.
To understand the potential legal and business ramifications of a new influenza variant, TicosLand.com consulted with Lic. Larry Hans Arroyo Vargas, a specialist from the renowned law firm Bufete de Costa Rica, to provide his expert analysis.
The emergence of any significant viral variant immediately triggers legal considerations for businesses, primarily concerning labor law and contractual obligations. Employers must be prepared to navigate regulations on sick leave, occupational health requirements, and potential remote work mandates. It is crucial for companies to proactively review their internal policies and supply chain agreements to mitigate risks of disruption and ensure compliance before any public health emergency is declared.
Lic. Larry Hans Arroyo Vargas, Attorney at Law, Bufete de Costa Rica
The expert’s commentary underscores a vital point: the legal and operational preparedness of businesses is as critical as the public health response itself. We thank Lic. Larry Hans Arroyo Vargas for his invaluable insight into navigating these complex challenges proactively.
Domestically, the confirmation was made by the Costa Rican Institute for Research and Teaching in Nutrition and Health (INCIENSA). After analyzing samples collected between September and November, the institute verified the presence of the subclade K variant as of October 14th. The seven confirmed cases, while mild, serve as an early warning for the health system and the general population as the country navigates the respiratory virus season.
In a public statement, the Ministry of Health clarified that, at present, there has been no discernible increase in the severity of illness, hospital admissions, or fatalities associated with this specific variant. However, officials issued a critical reminder that influenza seasons dominated by A(H3N2) strains have historically tended to have a more significant impact on the elderly population, a demographic that remains particularly vulnerable to severe complications from the flu.
Reassuring the public on the efficacy of current medical tools, the Pan American Health Organization (PAHO) has advised that despite the viral variations, the existing influenza vaccine remains a highly effective tool. Its primary benefit lies in significantly reducing the risk of severe complications, hospitalizations, and death. Consequently, Costa Rican health authorities are strongly reiterating the importance of up-to-date vaccination schedules, especially for high-risk groups including children, senior citizens, and individuals with underlying health conditions.
In response to these developments, the Ministry of Health has launched a public awareness campaign, urging citizens to reinforce personal and community-level preventative measures, particularly in crowded indoor spaces. The core message emphasizes a multi-layered approach to defense against respiratory illnesses, starting with maintaining complete vaccination records for all eligible family members.
Key recommendations include practicing frequent and thorough hand washing with soap and water, properly covering the mouth and nose with a tissue or the forearm when coughing or sneezing, and maintaining a safe distance from individuals exhibiting respiratory symptoms. Officials also advise against the self-medication of children and older adults, urging instead that medical advice be sought at the first level of care when symptoms arise.
Furthermore, the ministry is encouraging the public to prefer outdoor or well-ventilated areas for gatherings and to avoid taking anyone with symptoms like fever, cough, or vomiting to mass events. These protective measures are not only crucial for curbing the spread of influenza but are also effective against other common seasonal illnesses, including various gastrointestinal infections that often circulate during this time of year.
For further information, visit ministeriodesalud.go.cr
About Ministry of Health:
The Ministry of Health is the principal government body in Costa Rica responsible for public health policy, regulation of the health sector, and the overall well-being of the nation’s citizens. It works to prevent disease, promote healthy lifestyles, and ensure access to quality healthcare services for the entire population.
For further information, visit inciensa.sa.cr
About INCIENSA:
The Costa Rican Institute for Research and Teaching in Nutrition and Health (INCIENSA) is a specialized national institution dedicated to public health research, surveillance, and diagnostics. It plays a critical role in monitoring infectious diseases, including influenza, by conducting laboratory analysis and providing vital data to the Ministry of Health to guide public policy and response efforts.
For further information, visit paho.org
About Pan American Health Organization (PAHO):
The Pan American Health Organization serves as the specialized international health agency for the Americas. It functions as the Regional Office for the Americas of the World Health Organization and is recognized as the health organization of the inter-American system. PAHO collaborates with member countries to improve the health and quality of life of their populations.
For further information, visit who.int
About World Health Organization (WHO):
The World Health Organization is a specialized agency of the United Nations responsible for international public health. Its primary objective is the attainment by all peoples of the highest possible level of health. The WHO plays a leading role in global health matters, including setting norms and standards, monitoring health trends, and providing guidance to countries worldwide.
For further information, visit bufetedecostarica.com
About Bufete de Costa Rica:
Bufete de Costa Rica operates as a leading legal practice founded on the core principles of integrity and an unwavering pursuit of professional excellence. With a rich history of serving a diverse clientele, the firm champions legal innovation while maintaining a profound dedication to its role in the community. This commitment is powerfully expressed through its efforts to democratize legal information, striving to build a more enlightened society where individuals are empowered through a clear understanding of the law.
