According to vaccinology professor Shabir Madhi from Wits University there was no need to dump the AstraZeneca vaccine. He said while it was not effective against mild and moderate infection, but  it was likely it was effective against severe Covid-19 infection. Madhi said that among the healthcare work force, 75% probably don’t have risk factors and are not over the age which predisposes them to severe disease. So, if you vaccinate all healthcare workers with the AstraZeneca vaccine, 75% of the healthcare force is not going to derive any benefit, according to Madhi.

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