Telkom has announced that its CEO and executive director Sipho Maseko will step down on 30 June 2022. The telecoms company said the process to appoint a successor is well underway and a designated group CEO will be announced in the not too distant future.
It is possible that cooking oil prevented more looting in South Africa in the last week than the president, the ANC, the intelligence community, the army and the police combined. This, without question, says something about the versatility of the product. It says even more about the state of the state. When you are shown up by canola, you might want to revisit your strategy.ByHoward Feldman
Performance Media across Search, Social and Programmatic platforms is the single fastest growing area of digital media in South Africa. Combine that with the detailed analysis of campaign management, tagging and ad operations, and it becomes apparent that these highly specialist functions require a highly specialised unit.
The Transnet Port Terminals website has been hacked, implying that all companies under Transnet have been affected. All Transnet websites were down at the time when reporting was done for this SA Trucker article. The publication cited sources who requested to remain anonymous because they are not allowed to speak to the media.
The Covid-19 pandemic has hit South Africa's small business sector hard and there are grim statistics to bear this out. Those statistics will not be repeated here. After all, if you are a small business owner setting out on the road to recovery, the last thing you probably want is more details of the toll the pandemic has taken on small enterprises. Far more useful would be some good, solid tips on how to build back better after any business setbacks.ByAmeen Hassen
Widespread childhood pneumococcal vaccination reduces death and disease – even in unvaccinated individuals. This is because there is less circulation of the bacterium S. pneumoniae. This “indirect” immunity is often termed herd immunity.
The pneumococcal conjugate vaccine is available in many countries with support from Gavi, the international vaccine support programme.
Gavi has supported 60 low- and middle-income countries to introduce pneumococcal conjugate vaccines into routine vaccination. However, Gavi’s support is focused on the poorest countries. More than 30 countries, including 11 in Africa, are scheduled to “graduate” out of direct Gavi support when they become wealthy enough. For instance, when the gross national income per capita is above $1500 per person. Notably Nigeria, which suffers approximately 10% of the world’s deaths from pneumococcal disease, is on the transition list.
As countries “graduate” from Gavi support they will need to pay for the pneumococcal conjugate vaccine. Many will be looking for ways to maintain their use of the vaccine without diverting scarce resources.
The current pneumococcal conjugate vaccine schedule requires three doses of the vaccine. These are usually the most expensive vaccines in childhood immunisation programmes. South Africa, currently the only African country that procures these vaccines without financial assistance from Gavi, spends almost half of its entire vaccine procurement budget on pneumococcal conjugate vaccines.
One strategy to reduce the cost of vaccination is to reduce the number of doses required per child. We conducted a clinical trial to see if the dosing schedule could be safely reduced while preserving vaccine efficacy and found that a two-dose schedule induces the same final immune response as a three-dose schedule in a low- and middle-income country setting.
Using a two-dose schedule could considerably reduce vaccine programme costs in low- and middle-income countries.
Most low- and middle-income countries use a “2+1” vaccination schedule recommended by the World Health Organisation. Two primary doses are administered in infancy at six and 14 weeks of age. This is followed by one booster dose at 9 months. The booster dose is needed to maintain immunity over years. Therefore, in designing our study, we considered dropping primary doses and not the booster dose.
Antibodies can prevent invasive pneumococcal disease. This is the basis for individual protection. Antibodies can also prevent carriage, or asymptomatic infection in the nasopharynx. The level of antibodies needed to prevent carriage is likely higher than that needed to prevent disease. Preventing carriage in older children is thought to be the mechanism by which the vaccine induces herd immunity. This is because older children are the main reservoir of S. pneumoniae and carriage is much more common than disease.
In our recent randomised trial, we tested two “1+1” schedules for the two currently licensed pneumococcal conjugate vaccines, PCV13 (Prevnar 13) and PCV10 (Synflorix). We tested dropping either the six week dose or the 14 week dose from the original three-dose schedule. We measured antibody levels after the booster to determine if the 1+1 schedules result in similar levels of antibodies that the 2+1 schedule induces. The 2+1 schedule is already known to induce antibody levels high enough and for long enough to reduce carriage and provide herd immunity.
We found that the 1+1 schedules were not inferior to the 2+1 dose schedule in the levels of antibodies post-booster. This finding suggests that herd immunity, once in place, can be maintained by the reduced schedules.
However, the 1+1 schedules provided less protection before the boost when compared to the 2+1 schedules. Further, pre-boost immunity was better using a 14-week and nine-month 1+1 schedule, compared to a six-week and nine-month 1+1 schedule. All of these differences disappeared after the booster dose at nine-months.
Reducing pneumococcal conjugate vaccine dosing was previously explored in the United Kingdom. A 1+1 (three, 12 months) schedule produced immunity that was not inferior following the booster dose compared to the 2+1 schedule (two, four, 12 months). As a result, the UK moved to a two-dose schedule in 2019.
But the United Kingdom trial has left key questions unanswered for low- and middle-income countries. Our trial is the first to demonstrate that 1+1 schedules in a low- and middle-income setting produces a post-booster immune response that is not inferior to 2+1 schedules. We also showed that this is true for both pneumococcal vaccines currently in use.
Many countries offer the pneumococcal conjugate vaccine under severe financial constraints. Further, countries graduating from Gavi support may struggle to maintain pneumococcal conjugate vaccination and are at risk of losing its health benefits.
Based on our study findings low- and middle-income countries could consider dropping one of the primary doses. This would reduce the procurement cost of pneumococcal vaccination by one-third.
In considering the move to a two-dose schedule, the risk of invasive disease from substrains covered by the vaccines up to nine months of age should be considered. If that risk is high, it may not be appropriate to drop a dose, because dropping a dose will result in pre-booster immunity in a smaller proportion of vaccinees.
Countries that drop a dose should support surveillance studies to monitor invasive disease rates, perhaps via academic research institutions that can attract outside funding. Countries that decide to drop a dose also need to decide whether to administer the primary dose at six or 14 weeks. We found that using the 14-week dose results in immunity in a larger proportion of infants leading up to the boost. But, giving the first dose at 14 weeks would leave all infants susceptible to disease from six weeks to 14 weeks of age. Countries and their immunisation advisory boards will have to weigh these risks carefully.
Even in countries where dropping a primary dose may not be ideal, this will often be preferable to ending routine childhood pneumococcal conjugate vaccination or co-opting scarce resources from other essential public health programmes.
The Conversation Africa The Conversation Africa is an independent source of news and views from the academic and research community. Its aim is to promote better understanding of current affairs and complex issues, and allow for a better quality of public discourse and conversation. Go to: https://theconversation.com/africa
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