As people in South Africa roll up their sleeves to get
vaccinated against Covid-19 in the coming months, many will receive a jab made
by the pharmaceutical companies Pfizer and BioNTech. This vaccine is not only
highly effective but it is also at the cutting edge of vaccine science - being
one of the first of a new type of vaccines called messenger RNA, or mRNA for
short.
While scientists have been investigating and developing mRNA
technology for decades, (see this 2018 review in
Nature),
research in this area has recently been propelled forward by unprecedented
public financing in response to Covid-19.