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Most babies do not have adverse reactions after vaccination. Some baby vaccinated will fever, headache, loss of appetite, needle eye redness and swelling, pain or inflammation such as scleroma, this is the general response to vaccines, this kind of reaction generally do not need special treatment, 2 ~ 3 days to recover on its own. Due to individual differences, such as allergic constitution, some vaccines may occur in cases such as rash, anaphylactic shock and other allergic reactions. This is an abnormal reaction and needs to be treated in the hospital. Also some babies vaccination is a disease of disease, or there has not yet found the basis of the incubation period after vaccination coincidence, known as coupling, coupling and vaccine itself has nothing to do.
The rapid development of air filters is closely related to the development of military industry and electronic industry. In the first world war, the use of various chemical agents, asbestos fibre filter paper as the smoke filter layer of military gas masks came into being. The glass fiber filter medium is used in air filtration to obtain a patent in the United States in October 1940. In the 1950s, the United States studied the production process of glass fiber filter paper, and the air filter was improved and developed. In the 1960s, HEPA filters came out; In the 1970s, the filter paper of fine glass fiber was used as the HEPA filter of filter medium, and the filtration efficiency of particle size of 013 micron particle diameter was 99.9998%. Since the eighty s, with the emergence of new test method, use evaluation to improve and to improve the filtering performance requirements, found the HEPA filter there is a serious problem, and he had a higher ULPA filter performance. Countries are still working on it and expect more advanced air filters soon
World's longest over-water bridge, the 41.58km-long Qingdao Haiwan Bridge, opens to traffic in China's Qingdao on the last day of June. The bridge connects the city of Qingdao with Hongdao in Chengyang District as well as the suburban Huangdao District across the waters of the northern a part of Jiaozhou Bay in Shandong Province.
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