Before revision:  One of the finding is that the aggressive imposing the most significant measures followed by equally aggressive reducing them when the spread diminishes will effectively reduce the number of new infections to zero . We use the asymptotic periodicity of Bessel functions , which readily provides the required;
After revision:  One of the finding is that the aggressive imposing the most significant measures followed by equally aggressive reducing them when the spread diminishes will effectively reduce the number of new infections to zero ; we use the theory of Bessel functions , which readily provides the required;