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New nasal spray flu vaccines are available in China
Published on: 2021-10-09
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Nasal influenza vaccines are now available in China. The vaccines are applicable to children from three to 17 years old as an alternative to the traditional ones that are injected into the body through needles and syringes.
 

The vaccines are a kind of nasal spray that causes no physical pain to people. Each nostril takes 0.1 milliliters of the vaccines, and the vaccination process takes less than one minute.
 

After entering the human body through the nasal cavity, they first draw an immune response from the mucosa and then cells and body fluid by activating lymphocytes, experts said.
 

However, the nasal influenza vaccines are not applicable to everyone. They're not recommended to people who are: allergic to eggs or Gentamicin sulfate, have immune deficiency or impaired immunity or are using immuno-suppressive agents, have acute illness or serious chronic disease or acute outbreak of chronic disease, have fever, diagnosed to have nasitis, or are patients of Leigh syndrome who are using Aspirin or medicines containing that substance.
 

Those who have taken other vaccines recently, including the COVID-19 vaccines, should wait at least 14 days before taking the influenza vaccines.
 

鼻子喷一喷,疫苗就“打”好了!

最近,一款冻干鼻喷流感减毒活疫苗出现在流感疫苗接种点,适用于3岁至17岁人群。无须注射,对着两个鼻孔各喷一下,就能完成疫苗接种;与注射型疫苗一样,也是一年接种一次。
 

需要提醒的是,如果刚刚接种完新冠疫苗,需要在14天后才能接种流感疫苗。流感疫苗在接种后大约2周到一个月,发挥保护作用。
 

与传统的注射疫苗相比,鼻喷疫苗的最大特点是能更好地激活鼻黏膜以及支气管黏膜的免疫应答,从而更好地诱导黏膜局部免疫应答和全身特异性免疫反应。
 

据了解,冻干鼻喷流感减毒活疫苗只需在每个鼻孔喷0.1毫升,它模拟的是流感病毒感染过程,疫苗雾化后经鼻腔进入体内,先产生黏膜免疫,再通过激活淋巴细胞,产生细胞免疫和体液免疫。
 

这种疫苗使用简便,无创伤,可以使幼儿和青少年在使用中的依从性好于肌肉注射型疫苗。由此可见,鼻喷疫苗在未来应用中会显现出越来越大的优越性。

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