Daily Covid 19 Testing

Markk80:
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The irony co creator of mRNA technology v donated hundreds of millions towards worldwide vaccination programmes.
Why do we need mRNA technology for Covid vaccine why not just inject a disabled/‘attenuated’ version of the virus directly like other accepted types of vaccines.
Why can’t I have an AZ booster shot from the stocks that the vaccination centre has told me that they have sitting on the shelves.
Also why no offer of the approved oral anti viral meds to at risk groups on positive PCR.