Research Article
Post-vaccination Immunity to Pneumococcal, Haemophilus Influenzae Type B Infection and Influenza in Patients with Chronic Obstructive Pulmonary Disease(COPD)
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Mikhael Petrovich Kostinov, Andrey Dmitrievich Protasov, Alexander Victorovich Zhestkov, Dmitry Vladimirovich Pakhomov, Anna Vladimirovna Chebykina and Tatiana Alexandrovna Kostinova