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Widespread population immunity of Covid-19 observed in South Africa before Omicron wave

1. Widespread underlying SARS-CoV-2 seropositivity was observed in Gauteng province, South Africa, before the omicron wave.
2. Epidemiologic data demonstrated a decoupling of hospitalizations and deaths from infections while omicron was circulating.
Evidence Rating Level: 2 (Good)
Study Rundown: The Omicron variant was first identified in November 2021 in Gauteng province, South Africa, and was designated as a variant of concern due to its predicted high transmissibility and its potential to evade immunity from neutralizing antibodies induced by vaccination or natural infection with wild-type virus. The omicron variant outcompeted the delta variant in Gauteng and was responsible for 98.4% of the cases sequenced in South Africa in December 2021, and a prior population-wide seroepidemiologic study demonstrate that 19.1% of the population was seropositive for Covid-19. However, there is a gap in knowledge as to understanding the seroprevalence of Covid-19 before the omicron wave. This study found that there was widespread underlying SARS-CoV-2 seropositivity in Gauteng before the omicron-dominant wave of Covid-19. This study was limited by changes in the frequency of testing over time which limited head-to-head comparisons of case numbers across waves, and the fourth omicron wave had not fully subsided at the time of this analysis, which will result in a lag in the reporting of data such as hospitalizations and deaths attributable to this wave. Nevertheless, these study’s findings are significant, as they demonstrate that there was widespread seropositivity of Covid-19 in Gauteng prior to the omicron wave and that there was a decoupling of hospitalizations and deaths from infections while omicron was circulating.
Click to read the study in NEJM
Relevant Reading: Omicron — Decoupling Infection from Severe Disease
In-Depth [seroepidemiologic survey]: This seroepidemiologic survey was conducted from October to December 2021 in Gauteng province, South Africa, to determine the seroprevalence of SARS-CoV-2 IgG, obtaining samples from 7010 participants, of whom 18.8% had received a Covid-19 vaccine. Patients who live in the Gauteng province and were able to provide written informed consent were eligible for the study. Patients who resided outside of the studied province or declined to participate were excluded from the study. The primary outcome measured was seroprevalence measured with dried-blood-spot samples and tested for IgG against SARS-CoV-2 spike protein and nucleocapsid protein. Outcomes in the primary analysis were assessed via unadjusted, univariable analyses for each risk factor with generalized linear models with a log link to estimate risk ratios. Based on the analysis, the seroprevalence of SARS-CoV-2 IgG ranged from 56.2% among children younger than 12 years (95% Confidence Interval [CI], 52.6 to 59.7) to 79.7% among adults older than 50 years of age (95% CI, 77.6 to 81.5). 93.1% of vaccinated participants were seropositive for SARS-CoV-2 while 68.4% of unvaccinated participants were seropositive. Epidemiologic data also demonstrated that the incidence of Covid-19 infection increased and subsequently decreased more rapidly during the omicron wave than it had during the three previous waves. The incidence of infection was decoupled from the incidences of hospitalization, recorded death, and excess death during the fourth wave, as compared to the proportions seen in the previous three waves. Overall, this study demonstrated that there was widespread Covid-19 seropositivity in the Gauteng province of South Africa before the omicron wave, showing that there was a decoupling of hospitalizations and deaths from Covid-19 infections while the omicron variant was still circulating.
Image: PD
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Symbiosis School of International Studies Launches MA in African Studies – News18

Symbiosis School of International Studies (SSIS) has launched a masters of arts in African studies (geo-economics and foreign policy) that offers a holistic understanding of the African continent and its relation with major countries in the world. The two year long multidisciplinary programme focuses on the political, economic and socio-cultural environment of the continent and its impact on global affairs.Candidate should be a graduate from any statutory university with a minimum of 50 per cent marks (45 per cent for SC and ST) at the graduation level. Candidates appearing for the final year examination can also apply, but their admission will be subject to obtaining a minimum of 50 per cent marks (45 per cent for SC and ST) in the qualifying examination.
A candidate who has completed qualifying qualification from any foreign board/ university must obtain an equivalence certificate from the Association of Indian Universities (AIU) Symbiosis School of International Studies (SSIS), a constituent of the Symbiosis International (Deemed University) was established in 2012 with the aim to bring a discourse on international relations through a well-designed academic programme, conferences, symposia and exchanges with relevant stakeholders.
The MA African studies centers around the key areas of African economy, foreign policy, history, culture and identity. It also delves into the political processes and institutions, for a comprehensive understanding of the upswing development trajectory of the region.
Along with empowering students to learn and understand the African continent, the programme aims to strengthen analytical, critical thinking and communication skills, including developing a holistic understanding of the United Nations’ Sustainable Development Goals. The programme will also help the student to work in a multicultural environment.
Further, the third and fourth semesters offer electives to help students deep-dive into the subject around North, West and Central Africa and Eastern, Southern Africa and Island nations. It also offers Arabic and French language learning as part of its elective courses.
The curriculum includes a mandatory internship in the third semester to help students implement their theoretical learning with the real-world scenario. Post the completion of programme, students can pursue a host of career paths across the corporates, the NGOs, the civil service, think tanks, the media houses and international organizations or further, pursue doctoral studies in the domain.
Aspirants can apply for MA African Studies (Geo-economics and Foreign Policy) by visiting the official website of SSIS and registering for the programme. After successful online registration and payment of fee, subject to fulfillment of admission criteria, shortlisted candidates would be notified for Personal Interview (PI) via email.
The PI will be conducted virtually and aspirants will have to book their preferred slot for the same. Aspirants need to ensure uninterrupted connectivity and a well-functioning mic to undergo the PI. The maximum score for PI will be 100 marks and can cover general awareness, clarity of thought and articulation, logical reasoning, learning orientation, motivation, extracurricular activities, specific field of interest, communication and soft skills, and overall personality.
Shivali Lawale, Director, Symbiosis School of International Studies said, “It brings us immense pleasure to announce the launch of M.A in African Studies focusing on Geo-economics and Foreign Policy. With the launch of this programme, we are steadily diversifying our platform for teaching and research in international relations, with an emphasis on India and its role in global affairs. Through this programme, we hope to empower future leaders and corporates, who will strengthen the collaborations between India and Africa. We look forward to welcoming our first batch of students.”
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