Why is it so difficult to make an effective vaccine against dengue?
The dengue virus has four subtypes, which each circulate at different levels in different countries, regularly fluctuating in prevalence. Developing a vaccine that effectively targets all of these subtypes has been notoriously challenging
The dengue virus has four subtypes, which each circulate at different levels in different countries, regularly fluctuating in prevalence. Developing a vaccine that effectively targets all of these subtypes has been notoriously challenging
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