tetano
Editor, Senior Moderator
J Public Health (Oxf)
. 2020 Sep 17;fdaa170.
doi: 10.1093/pubmed/fdaa170. Online ahead of print.
Seroprevalence of anti-SARS-CoV-2 antibodies in residents of Karachi-challenges in acquiring herd immunity for COVID 19
Samreen Zaidi[SUP] 1 [/SUP], Faiza Rizwan[SUP] 2 [/SUP], Quratulain Riaz[SUP] 3 [/SUP], Asma Siddiqui[SUP] 4 [/SUP], Shabnam Khawaja[SUP] 5 [/SUP], Mehjabeen Imam[SUP] 6 [/SUP], Arshi Naz[SUP] 3 [/SUP], Samra Waheed[SUP] 3 [/SUP], Tahir Shamsi[SUP] 3 [/SUP]
Affiliations
Abstract
Background: The recent pandemic by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a global emergency. There is large number of asymptomatic cases of SARS-CoV-2 that are not reported. Hence, serological evidence of SARS-CoV2 antibodies is warranted for a better estimation of the actual number of infected patients to limit the disease spread and to get an idea of herd immunity.
Methods: This is a cross-sectional study conducted from May 2020 to July 2020 at National Institute of Blood Diseases at Pakistan. The study includes healthcare workers (HCWs), community and industrial workers. The anti-SARS-CoV-2 test was performed by electrochemiluminescence immunoassay analyzer.
Results: A total of 1675 samples have been received from three groups of population. The percentage positivity for industrial employees is high (50.3%) for HCW (13.2%) and community population (34%).Total percentage for positive antibodies result is ~36%.
Conclusion: Our seroprevalence is 36%, which still far from herd immunity that needs to be at least 60-70% in population. If we consider acquiring 60% seroprevalence in next few months, then herd immunity is not far from reality, provided the antibodies did not decline with time. Although the current study is based on a small sample of participants, the findings suggest a study with larger population to implement stronger and targeted interventions.
Keywords: infectious disease; public health.
. 2020 Sep 17;fdaa170.
doi: 10.1093/pubmed/fdaa170. Online ahead of print.
Seroprevalence of anti-SARS-CoV-2 antibodies in residents of Karachi-challenges in acquiring herd immunity for COVID 19
Samreen Zaidi[SUP] 1 [/SUP], Faiza Rizwan[SUP] 2 [/SUP], Quratulain Riaz[SUP] 3 [/SUP], Asma Siddiqui[SUP] 4 [/SUP], Shabnam Khawaja[SUP] 5 [/SUP], Mehjabeen Imam[SUP] 6 [/SUP], Arshi Naz[SUP] 3 [/SUP], Samra Waheed[SUP] 3 [/SUP], Tahir Shamsi[SUP] 3 [/SUP]
Affiliations
- PMID: 32940328
- DOI: 10.1093/pubmed/fdaa170
Abstract
Background: The recent pandemic by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a global emergency. There is large number of asymptomatic cases of SARS-CoV-2 that are not reported. Hence, serological evidence of SARS-CoV2 antibodies is warranted for a better estimation of the actual number of infected patients to limit the disease spread and to get an idea of herd immunity.
Methods: This is a cross-sectional study conducted from May 2020 to July 2020 at National Institute of Blood Diseases at Pakistan. The study includes healthcare workers (HCWs), community and industrial workers. The anti-SARS-CoV-2 test was performed by electrochemiluminescence immunoassay analyzer.
Results: A total of 1675 samples have been received from three groups of population. The percentage positivity for industrial employees is high (50.3%) for HCW (13.2%) and community population (34%).Total percentage for positive antibodies result is ~36%.
Conclusion: Our seroprevalence is 36%, which still far from herd immunity that needs to be at least 60-70% in population. If we consider acquiring 60% seroprevalence in next few months, then herd immunity is not far from reality, provided the antibodies did not decline with time. Although the current study is based on a small sample of participants, the findings suggest a study with larger population to implement stronger and targeted interventions.
Keywords: infectious disease; public health.