Humans appear to be fighting a never-ending battle against COVID-19 using vaccines that have so far been ineffective against the constantly mutating variants.

Since the unprecedented COVID-19 global pandemic that started in January 2020, humans have been in a constant battle with the SARS-CoV-2 virus.

A series of vaccine versions have been developed and administered globally, beginning in January 2021 when an mRNA vaccine based on the original Wuhan strain was implemented. Subsequently, a bivalent mRNA vaccine was developed based on the Omicron offspring. Currently, the most updated version is based on XBB.1.5 and is ready to be injected into people’s arms.

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