Delta lessons and why vaccines should be locally manufactured

Small Pox vaccine. (Courtesy/iStock)

Once bitten, twice shy. Strange infectious diseases are frequently reported in Africa. Let's talk about the Delta variant of concern, which caused widespread devastation during Covid-19 pandemic.

First, new and emerging variants with different characteristics may cause breakthrough infections. As is now widely known, the evolution of Covid-19 around the world resulted in many variants and sub-variants.