Consider the context of a disease spreading through a global network. Which of the following statements is false?
a) If a disease has different fatality rates depending on specific factors, such as COVID-19 being more dangerous for older people, then the best vaccination strategy for minimizing the number of deaths would be to prioritize high-risk groups. However, if the objective is to eradicate the disease, the best strategy would be to prioritize nodes with the highest number of links, since these nodes contribute more to disease transmission.
b) A disease with a very high fatality rate tends to be less likely to spread globally and become a pandemic, especially if infected individuals die before transmitting the disease to many others. In network terms, death removes a node from the transmission network, reducing the number of possible future infections.
c) If a vaccine exists and 90% of the population is vaccinated at random, the remaining 10% of unvaccinated individuals will not be affected at all by the existence of the vaccine.
d) Early identification of a disease, together with measures such as quarantine and social isolation, is one of the first and most important steps to prevent a local outbreak from becoming a pandemic.
e) None of the above is false.
Original idea by: Henrique Campos Padula
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