Therefore, the situation requires an urgent, strategic, multipronged and unprecedented response to not only alleviate the situation but to minimise possibility of its painful recurrence.
In other words, there are justifiable grounds based on empirical studies that most of the infected people would retain infection immunity within the said months, or at least, would still have protective immunity against severe symptoms.
Students were infected at home or from outside and brought the virus to school, which resulted in schools having to be closed.