Researches on influenza vaccination I - The study by Donalisio et al. (2003) found a high incidence of adverse events after influenza vaccination ...

Researches on influenza vaccination

I - The study by Donalisio et al. (2003) found a high incidence of adverse events after influenza vaccination in the elderly population of Campinas, SP.
II - The study by Moura and Silva (2004) investigated the opinion of the population of the state of São Paulo about influenza vaccination campaigns.
III - The study by Margolis et al. (1990) found a low frequency of adverse reactions after influenza vaccination.
IV - The study by Perucchini et al. (2004) investigated adverse reactions to influenza vaccination in the elderly population, with and without pneumococcal vaccination.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) Only I, II, and IV are correct.
e) All statements are correct.