National Pandemic Influenza Preparedness Plan

Objectives

Croatia’s National Pandemic Influenza Preparedness Plan establishes a staged national framework for preparedness, response, recovery and revision, spanning the interpandemic period, emergence of a novel virus, sustained human transmission, pandemic activity and return to the interpandemic period.[1][2][3][4]Its central purpose is to reduce health and societal consequences through early detection, surveillance, vaccination, antiviral measures, clinical preparedness, communication, logistics and coordinated action before vaccine supplies can meet pandemic demand.[5][6][7]

• Develop and maintain a comprehensive influenza-control strategy, including epidemiological and virological monitoring, laboratory diagnosis, vaccine and drug planning, national stockpiles, logistics and reliable information flows.[1][8]
• Detect potentially pandemic strains early, identify circulating viruses, assess population susceptibility, monitor morbidity, mortality, clinical severity and affected risk groups, and use findings to guide proportionate public-health action.[9][10][11]
• Prepare vaccination strategies that prioritise older people, people with chronic diseases, people at increased exposure risk, essential health workers and vital state services when supplies are limited, while recognising whole-population coverage as the preferred continuation where feasible.[8]
• Secure pandemic vaccines, antivirals, antibiotics, symptomatic medicines, protective equipment and diagnostic supplies; expand hospital, home-care and funeral-service capacity; and prepare ministries and counties to implement operational protocols.[6][12][13][14]
• Use antivirals to supplement immunisation for prevention and treatment while pandemic vaccine is unavailable, with oseltamivir and zanamivir prioritised for H5N1-related planning and treatment focused on people at high risk of complications.[15][16][13]
• Manage successive pandemic waves by continuing and adapting first-wave measures according to experience and changing vaccine or drug availability, then assess overall consequences and update the National Plan using Croatian experience and World Health Organization guidance.[17][9]
• Prevent, detect, contain and eradicate avian influenza through mandatory notification, poultry and wild-bird surveillance, farm biosecurity, import controls, laboratory confirmation, movement restrictions and, where necessary, stamping-out measures.[18][19][20][21][22]

Implementation

Implementation combines central direction by health and veterinary authorities with county-level delivery, statutory reporting networks, laboratory confirmation, staged escalation and international coordination.[1][23][24]The Ministry of Health and Social Welfare leads human-pandemic preparedness, while veterinary bodies lead animal-health control; the Croatian National Institute of Public Health and county public health institutes provide surveillance, diagnostics, analysis and operational support.[6][12][19]

• Establish a National Committee on Intrapandemic Planning, or use the Ministry of Health Crisis Headquarters in this role, to connect central government, local self-government and technical health organisations, assign responsibilities and maintain an emergency chain of command.[2][8]
• Coordinate county implementation through County Health Headquarters, public health institute epidemiology leads, hospitals, first-contact physicians, sanitary inspectors, veterinarians and laboratories.[1][8][23]
• Operate surveillance through individual notifications outside the influenza season, cluster reporting, weekly age-group aggregate reporting during the season, laboratory reports and urgent escalation of novel strains through national, international and veterinary channels.[10][25]
• Collect and rapidly transport respiratory specimens and paired blood samples to the National Laboratory for Influenza, maintain virological testing and diagnostic readiness, and expand laboratory staffing, equipment, reagents, workspace and high-containment capability where required.[26][10][25][3][4][18]
• Coordinate daily contact and reporting with the World Health Organization during escalating risk, collaborate with reference laboratories, and communicate authorised public and professional advice through health crisis structures and appropriate media.[24][25][11]
• Distribute drugs through central stocks held by the Croatian National Institute of Public Health, county public health institutes and the Zagreb Institute of Public Health, using risk-group estimates from primary care to guide allocation and adapting distribution as transmission becomes widespread.[14]
• Manage patients through screening, home care, observation, antiviral treatment or hospitalisation according to clinical severity, pneumonia, co-morbidity and stability; increase hospital beds, staffing and equipment when demand rises.[17][14][3]
• Implement veterinary control by requiring immediate reporting of suspected avian influenza, restricting animal movement, submitting samples to the Croatian Veterinary Institute Poultry Centre, defining infected and threatened areas, and applying isolation, trade restrictions, culling, disposal and disinfection as necessary.[20][21][22]
• Monitor delivery through weekly, daily or stage-specific notifications, laboratory confirmation, trend analysis, vaccination surveillance and reporting to national and World Health Organization channels; however, no consolidated quantitative performance framework, independent evaluation mechanism or detailed budget is specified.[26][12][4]

Monitoring & Evaluation

The plan establishes a multi-layered surveillance and reporting system for seasonal, pandemic and avian influenza, linking clinicians, laboratories, local public-health bodies, national authorities, veterinary services and international organisations. It relies principally on notification, laboratory confirmation, trend analysis and staged escalation of reporting rather than a formal performance-management framework.[1][8][12][17][10][19][21]

• Monitor influenza trends, morbidity, mortality, circulating viruses and emerging subtypes in humans, as well as influenza in poultry and pigs, including illness among vaccinated people.[12][23][24][17][9]
• Require physicians to notify suspected cases, influenza-like-illness clusters and out-of-season influenza promptly, participate in sample collection, and report clusters immediately at Stage 4.[23][24][10][25]
• Use individual case notification initially and switch, when epidemiologically appropriate, to weekly aggregate reporting by epidemiological week, age group, location and outcome; county health headquarters also report local trends to the Croatian National Institute of Public Health.[26][12][10]
• Require laboratories to submit weekly aggregate reports on positive findings during the influenza season, confirm positive samples through the National Influenza Laboratory, and report routine virus findings to the World Health Organization FluNet network in non-pandemic years.[25]
• Escalate reporting from weekly to daily during higher-risk stages, maintain emergency diagnostic capacity, introduce null reporting at Stage 5, and communicate relevant international information urgently to national epidemiology services.[3][4]
• Conduct serological and microbiological investigations of suspected cases and clusters, identify circulating strains, test antiviral sensitivity, assess population susceptibility and analyse the effects of the first pandemic wave.[8][17][9]
• Monitor vaccination campaigns and investigate suspected increases in illness among vaccine recipients, including virus isolation and typing where indicated.[26][12]
• Maintain accountability through assigned reporting lines: virology services report completed activities to the Ministry of Health and Social Welfare, county health headquarters check earlier-stage actions, and the Croatian Army Veterinary Service reports animal-disease control measures and outbreak closure to the competent Veterinary Office.[23][22]
• Require notification of suspected and confirmed avian influenza, undertake official laboratory investigation and serological screening, and record and regularly service Class III biosafety-cabinet procedures.[18][19][20][21]
• Specify no formal performance indicators, independent audit process, consolidated evaluation methodology or sanctions for non-compliance beyond the notification, confirmation, reporting and information-sharing procedures described.[1][23][10][11][15][3][19]

Costing & Financing

Financing is framed primarily as responsibility for securing medicines, vaccines, laboratory capacity and response logistics. The Ministry of Health and Social Welfare is assigned responsibility for funding implementation of ministry guidance within the health system, but no quantified overall budget, financing allocation, funding gap or economic assumption is provided.[24][17][9]

• Procure annual seasonal vaccines for people at increased risk, reserve or procure pandemic vaccines, stockpile antivirals, antibiotics and supportive medicines, and expand hospital, home-care, funeral and laboratory capacity.[6][12][7][13][14]
• Secure supplementary laboratory equipment, reagents, transport media, high-protection laboratory adaptation and, where required, additional skilled staff.[26][23][24][3]
• Provide free-of-charge influenza sample testing through the “Influenza Control” project, although its budget and wider financing arrangements are not specified.[10][25]
• Approve purchase of 560,000 doses of interpandemic influenza vaccine for 2005.[7]
• Maintain minimum preparedness stocks for antiviral treatment for 250,000 people, at least 2,000,000 pandemic vaccine doses for the first wave, standard vaccine for approximately 60,000 at-risk people when a pandemic occurs outside Croatia, and vaccine for approximately 700 people likely to contact avian influenza virus.[13]
• Plan oseltamivir resources for 1,000 post-exposure recipients and pre-exposure prophylaxis for 14,400 essential staff, requiring 61,000 ten-capsule boxes.[16]
• Consider powder-form oseltamivir as a lower-cost option only where domestic capsulation capacity is available; the source identifies operational complexity if this capacity is absent.[15][16]
• Specify no monetary budgets, procurement prices, compensation arrangements for animal-control measures, funding sources beyond ministry responsibility, or funding gaps for laboratory capacity, avian-influenza control or the broader pandemic response.[6][15][18][20][22]