Background
Although vaccination can be a useful tool for control of avian influenza epidemics, it might engender emergence of a vaccine-resistant strain. Field and experimental studies show that some avian influenza strains acquire resistance ability against vaccination. We investigated, in the context of the emergence of a vaccine-resistant strain, whether a vaccination program can prevent the spread of infectious disease. We also investigated how losses from immunization by vaccination imposed by the resistant strain affect the spread of the disease.
Methods and Findings
We designed and analyzed a deterministic compartment model illustrating transmission of vaccine-sensitive and vaccine-resistant strains during a vaccination program. We investigated how the loss of protection effectiveness impacts the program. Results show that a vaccination to prevent the spread of disease can instead spread the disease when the resistant strain is less virulent than the sensitive strain. If th
Saliva as a gold-standard sample for SARS-CoV-2 detection
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Performance and operational feasibility of antigen and antibody rapid diagnostic tests for COVID-19 in symptomatic and asymptomatic patients in Cameroon: a clinical, prospective, diagnostic accuracy study
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Ebola: The New Fake Outbreak
We’re being warned that a new Ebola outbreak is spreading.
Yahoo News (February 26, 2021): “On Feb. 17, the World Health Organization reported a cluster of Ebola cases in Guinea…The Biden administration is moving forward with plans to screen airline passengers from two African countries arriving in the U.S. for Ebola…”
Before yet another lunatic pandemic story takes off, people need to understand the multiple hoaxes behind Ebola.
I covered the story in 2017 and 2014. Here are the essential quotes from my pieces. Buckle up:
There is one predictable outcome: at Congo clinics and hospitals, frightened people who arrive with what are labeled “early signs” of Ebola will be diagnosed as probable cases. What are those symptoms? Fever, chill, sore throat, cough, headache, joint pain. Sound familiar? Normally, this would just be called the flu.