During a pandemic, in a large metropolis, the virus runs rampant. From this population, 100 individuals healthy people r

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During a pandemic, in a large metropolis, the virus runs
rampant. From this population, 100 individuals
healthy people randomly recruited from the population are subjected
to a double-blind test of a fresh vaccine.
developed is put to the test. The sample is randomly divided into
two groups of 50, called
Control and Treatment. Individuals in group T receive the vaccine
and those in Group
C, a placebo. After 50 days, 4 individuals were found to have been
infected, 3 from Group C and 1 from Group
of T. Can you conclude that the vaccine was effective? Which had
some level of effectiveness? substantiate your conclusions
in a text from 400 to 600 strokes