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14 August 2020 | Story Andre Damons | Photo Supplied
Max du Preez, Editor: Vrye Weekblad (top left), was the facilitator was the facilitator for Thursday’s UFS Though-Leader webinar that included Prof Salim Abdool Karim, Director: Centre for the AIDS Programme of Research in South Africa (CAPRISA) and Chair: South African Ministerial Advisory Committee on COVID-19 (top right); Prof Glenda Gray, President and CEO: South African Medical Research Council (SAMRC) (bottom left); and Prof Felicity Burt from the UFS and NRF-DST South African Research Chair in Vector-borne and Zoonotic Pathogens Research (bottom right), participated in Thursday’s Though-Leader webinar.

Although the decline in COVID-19 cases is a promising sign for South Africa, there are concerns about a second surge, and the country should not become complacent.

This was the opinion of the three experts who took part in the first Thought-Leader webinar presented by the University of the Free State (UFS) on Thursday, 13 August. The 2020 UFS Thought-Leader Webinar Series, themed 'Post-COVID-19, Post-Crisis', is taking place in collaboration with Vrye Weekblad as part of the Vrystaat Literature Festival’s online initiative, VrySpraak-digitaal.

The panellists included top experts such as Prof Salim Abdool Karim, Director: Centre for the AIDS Programme of Research in South Africa (CAPRISA) and Chair: South African Ministerial Advisory Committee on COVID-19; Prof Glenda Gray, President and CEO: South African Medical Research Council (SAMRC); and the UFS’ Prof Felicity Burt, NRF-DST South African Research Chair in Vector-borne and Zoonotic Pathogens Research.
Prof Karim said the downward decline is consistent and the number of patients presenting at hospitals is also declining.
 
Promising trend of decline
“What we are seeing is a promising trend, and it looks like we are on the decline. A question that I am often asked is: Is the worst over? The answer is not clear-cut. We are concerned about the risk of a second surge. If anything – what really concerns me at this stage is a second surge, as I think about how the pandemic may play out over the next few weeks,” said Prof Karim. 

He also referred to countries such as the US, Spain, New Zealand, Vietnam, and South Korea, which are now facing a second surge. 

“We need to be very careful; this is not the time for complacency. We need to maintain all our efforts. If we look at one of the key drivers, it is the need for our economy to restart. We need to get people back to work,” said Prof Karim. 
According to him, we have to look at COVID-19 not as a sprint, but as a marathon. “As we learn to co-exist with this virus, aim for containment; we need to plan for the long term. Even if we get a vaccine, it is unlikely that we will be able to vaccinate a substantial part of our population before the end of next year.” 

“We need to transition from being scared to a situation where we can control our risk. When we know that we can control the risk and then influence the risk, we influence the risk of everyone around us. Part of the new normal is the strategy of mitigation with prevention, plus preventing outbreaks.”

Schools and vaccine development
Prof Gray spoke about whether schools should be open and the role that children play in transmission, how to avoid the second wave, how to adjust our testing, and the exciting news around vaccine development. 

As a paediatrician and a parent, Prof Gray said she believes schools should open. “Children have a different immune response to COVID-19. They have different immune responses to Coronavirus and they probably have less viral-load copies which makes them have milder diseases. They are lucky to have been spared from symptomatic or severe disease,” said Prof Gray. 

According to her, schools need to be de-risked as much as possible, with children and teachers wearing masks, washing hands, making sure that there is good ventilation in the school and that windows are wide open. 

“We also need to know about the comorbidity and ages of teachers, so that we can keep the sick and older teachers out of direct contact. The younger teachers with no comorbidities should be teaching. 

“We also know from our experiences with health workers that transmissions happen in the tearoom where teachers take off their masks and talk. We need to minimise the transmissions in tearooms and protect teachers and parents who are older and have comorbidities.”  

Prof Gray said from data she has seen, schools play a very small role in the transmission of COVID-19; a lot more (transmissions) happen in the community, by commuting, and overcrowded taxis.

Prof Gray agreed with Prof Karim that we should be concerned about a second wave, and that we need to make sure community transmissions are minimised. 

Regarding a vaccine, Prof Gray said a global race is on to find a vaccine. “The more vaccines the better, we want more vaccines to work. The more vaccines, the more affordable they are, and the more doses are available.”

One health approach

During her presentation, Prof Burt said the current response to outbreaks is largely reactive rather than proactive, and “if we have more of a one-health approach, with forecasting, early detection, and a more rapid response, we could have an impact on public health in the future”. 


News Archive

Prof Tredoux turns theories regarding the formation of metals on its head
2013-09-17

 

Prof Marian Tredoux
17 September 2013

The latest research conducted by Prof Marian Tredoux of the Department of Geology, in collaboration with her research assistant Bianca Kennedy and their colleagues in Germany, placed established theories regarding how minerals of the platinum-group of elements are formed, under close scrutiny.

The article on this research of which Prof Tredoux is a co-author – ‘Noble metal nanoclusters and nanoparticles precede mineral formation in magmatic sulphide melts’ – was published in Nature Communications on 6 September 2013. It is an online journal for research of the highest quality in the fields of biological, physical and chemical sciences.

This study found that atoms of platinum and arsenic create nanoclusters, long before the mineral sperrylite can crystallise. Thus, the platinum does not occur as a primary sulphur compound. The research was conducted at the Steinmann Institute of the University of Bonn, Germany, as well as here in Bloemfontein.

Monetary support from Inkaba yeAfrica – a German-South African multidisciplinary and intercultural Earth Science collaborative of the National Research Foundation (NRF) – made this research possible. Studies are now also being conducted on other metals in the precious metal group, specifically palladium, rhodium and ruthenium.

The discovery of the nanoclusters and the combination with arsenic can have far-reaching consequences for the platinum mine industry, if it can be utilised to recover a greater amount of platinum ore and therefore less wastage ending up in mine dumps. This will signify optimal mining of a scarce and valuable metal, one of South Africa’s most important export products.

For Prof Tredoux, the research results also prove thoughts she already had some twenty years ago around the forming of platinum minerals. “Researchers laughed in my face, but the evidence had to wait for the development of technology to prove it.” Young researchers were very excited at recent congresses about the findings, since the new models can bring new insights.

“Chemistry researchers have been talking about platinum element clusters in watery environments for quite a while, but it was thought that these would not appear in magmas (molten rock) due to the high temperatures (>1 000 degrees celsius).”

Prof Tredoux has already delivered lectures at congresses in Scotland, Hungary, Sweden and Italy on this research.

Read the article at: http://www.nature.com/ncomms/2013/130906/ncomms3405/full/ncomms3405.html

 

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