Two 💉💉 is better than one 💉.
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The first dose helps you develop an immune response 🚨⚠️ The second dose boosts your immunity to the coronavirus 🙅🏽♀️👋🏽🦠
The Facts
Some COVID-19 vaccines, such as Pfizer-BioNTech and Moderna, require two doses for a strong immune response. Others such as Johnson & Johnson, CanSinoBIO, Sputnik Light, only require one dose; but a second booster is recommended to reinforce immunity.
https://www.healthline.com/health/why-two-doses-of-covid-vaccine