Angela R. Wateska

Learn More
Enterovirus 71 (EV71) is a growing public health concern, especially in Asia. A surge of EV71 cases in 2008 prompted authorities in China to go on national alert. While there is currently no treatment for EV71 infections, vaccines are under development. We developed a computer simulation model to determine the potential economic value of an EV71 vaccine for(More)
CONTEXT The cost-effectiveness of 13-valent pneumococcal conjugate vaccine (PCV13) compared with 23-valent pneumococcal polysaccharide vaccine (PPSV23) among US adults is unclear. OBJECTIVE To estimate the cost-effectiveness of PCV13 vaccination strategies in adults. DESIGN, SETTING, AND PARTICIPANTS A Markov state-transition model, lifetime time(More)
OBJECTIVE Determine the effects on the vaccine cold chain of making different types of World Health Organization (WHO) Expanded Program on Immunizations (EPI) vaccines thermostable. METHODS Utilizing a detailed computational, discrete-event simulation model of the Niger vaccine supply chain, we simulated the impact of making different combinations of the(More)
BACKGROUND The 13-valent pneumococcal conjugate vaccine (PCV13) is approved by the U.S. Food and Drug Administration for adults, but its role in older adults is unclear. PURPOSE To compare PCV13 strategies to currently recommended vaccination strategies in adults aged ≥65 years. METHODS Using a Markov model, the cost effectiveness of PCV13 and the(More)
BACKGROUND Many countries, such as Niger, are considering changing their vaccine vial size presentation and may want to evaluate the subsequent impact on their supply chains, the series of steps required to get vaccines from their manufacturers to patients. The measles vaccine is particularly important in Niger, a country prone to measles outbreaks. (More)
Although the substantial burdens of rotavirus and pneumococcal disease have motivated many countries to consider introducing the rotavirus vaccine (RV) and heptavalent pneumococcal conjugate vaccine (PCV-7) to their National Immunization Programs (EPIs), these new vaccines could affect the countries' vaccine supply chains (i.e., the series of steps required(More)
OBJECTIVES We investigated whether introducing the rotavirus and pneumococcal vaccines, which are greatly needed in West Africa, would overwhelm existing supply chains (i.e., the series of steps required to get a vaccine from the manufacturers to the target population) in Niger. METHODS As part of the Bill and Melinda Gates Foundation-funded Vaccine(More)
OBJECTIVE Since many of the world's vaccine supply chains contain multiple levels, the question remains of whether removing a level could bring efficiencies. METHODS We utilized HERMES to generate a detailed discrete-event simulation model of Niger's vaccine supply chain and compared the current four-tier (central, regional, district, and integrated(More)
BACKGROUND When addressing the urgent task of improving vaccine supply chains, especially to accommodate the introduction of new vaccines, there is often a heavy emphasis on stationary storage. Currently, donations to vaccine supply chains occur largely in the form of storage equipment. METHODS This study utilized a HERMES-generated detailed, dynamic,(More)
BACKGROUND When policymakers make decision about the target populations and timing of influenza vaccination, they may not consider the impact on the vaccine supply chains, which may in turn affect vaccine availability. PURPOSE Our goal is to explore the effects on the Thailand vaccine supply chain of introducing influenza vaccines and varying the target(More)