Seroprevalence of primary health care workers in Saint-Petersburg during a measles epidemic by T. M. Chemovа, V. N. Timchenko, E. V. Barakina, E. B. Pavlova, A. N. Nazarova, А. L. Balashov, I. A. Egorova, Е. L. Kostritsa, A. A. Zherebtsova

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