Easy to use, more effective and cheap, nasal Covid vaccines can be game changer: Scientists
![](https://www.financialexpress.com/wp-content/uploads/2022/09/nasal1.jpg)
A nasal, non-invasive and cheaper alternative to injectable vaccines could be just what is needed in a world battling a waning and waxing Covid wave with new variants throwing up challenges at every step, the experts said.
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