A Phase II Clinical Trial for Inactivated Enterovirus Type 71 Vaccine (Human Diploid Cell, KMB-17 Cell) in Chinese Infants

EV71-KMB17-II-IMB-CAMS

Enterovirus 71 (EV71), a major pathogen that is responsible for causing hand-foot-and-mouth disease (HFMD) worldwide, is a member of the Human Enterovirus species A, family Picornaviridae. Since the late 1990s, a series of large HFMD epidemics caused by EV71 have been reported in the Asia-Pacific region. Notably, there is evidence that the most severe cases from these epidemic outbreaks are associated with neurological disorders with CNS involvement caused by EV71 infection. Because of these EV71 infection-related public health issues, the research and development of EV71 vaccine candidates have been heavily promoted. Recently, several EV71 vaccine candidates have been evaluated in animals but no final results of clinical trials, including inactivated vaccine, attenuated vaccine, subunit vaccine, DNA vaccine, epitope peptide vaccine, virus-like particles (VLPs). Basing on the previous studies of elicited protection in mice and rhesus monkeys, a formalin-inactivated EV71 vaccine (Human Diploid cell, KMB-17 Cell) has been licensed by SFDA in China, Dec. 2010. The phase I clinical trial was completed, during four months, in Guangxi Province, China. The phase II clinical trial has been carried out, from July 2011. The purpose of phase II is to evaluate the safety and efficacy of the formalin-inactivated EV71 vaccine in Chinese infants (from 6 to 36 months old).

2011-07-01

2012-01-01

2012-02-01

Completed

Early phase I

660

Inclusion Criteria: * Healthy subjects (6-35 months infants) as established by medical history and clinical examination * Full-term (37-42 weeks), weight ≥ 2500 g when it was born * The subjects' legal guardian must be aware of this vaccines * The subjects' legal guardian voluntarily participate in the study and signed Informed Consent Form * Subjects with temperature ≤ 37.0℃ * The subjects' legal guardian with the ability and objective to comply with the requirements of the protocol * Persist for a 2-month visit and receive blood tests according to program requirements Exclusion Criteria: * Subject who has a clinical diagnosis history of Hand, Foot and Mouth Disease (HFMD) * 37 weeks gestation * weight ≤ 2500 g when it was born * Allergy or serious side-effects to a vaccine or any ingredient of vaccine * Epilepsy, seizures, convulsions, neurological illness * Congenital or hereditary immunodeficiency * Autoimmune disease * Severe malnutrition or dysgenopathy * Asthma, thyroidectomy, angioneurotic edema, diabetes or cancer * Asplenia, functional asplenia, and any circumstances leading to the asplenia or splenectomy * Clinical diagnosis of coagulopathy (such as clotting factor deficiency, coagulation disorders, platelet abnormalities), significant bruising or blood clotting disorder * Acute illness or acute exacerbation of chronic disease in last 7 days * Any prior administration of immunodepressant or corticosteroids in last 6 months * Any prior administration of blood products in last 3 months * Any prior administration of live-attenuated vaccine in last 28 days or 1 months * Any prior administration of subunit or inactivated vaccines in last 14 days Under the anti-TB prevention or therapy * Fever before vaccination, axillary temperature ﹥37.0℃ * The laboratory test abnormalities before vaccination, including blood tests (hemoglobin, total white blood cells, WBC, platelets), blood biochemistry tests (ALT, total bilirubin, direct bilirubin, Cr, BUN) and urine tests (urine protein, urine sugar, blood cells), etc. * Hypertension or hypotension. Systolic blood pressure ﹥140mmHg and/or diastolic blood pressure ﹥90mmHg; systolic blood pressure ﹤90mmHg and/or diastolic blood pressure ﹤60mmHg * Any condition that in the opinion of the investigator, may interfere with the evaluation of study objectives

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2023-10-11