China testing Wuhan residents to find out actual rate of Covid-19 infection, antibodies

China is carrying out a large-scale “seroprevalence” survey to check for Covid-19 antibodies in the population of Wuhan where the novel coronavirus first emerged late last year before spreading rapidly in three months to trigger a global pandemic.

It was initiated in March under China’s national health commission (NHC), the central ministry coordinating the country’s control and containment measures against the outbreak.

A seroprevalence study is carried out by collecting blood samples from a large population sample across age groups to check for antibodies against particular disease – in this case, Covid-19.

Besides the general population, the “sero” investigation is likely focussing on high-risk groups like those who worked in wet markets in Wuhan, and people who dealt and traded in wildlife.

The result will aid in separating the confirmed and symptomatic cases from the asymptomatic ones or those individuals, who have been infected, do not show any symptom but could infect others.

In simple terms, the survey results will reveal for the first time the total number of Covid-19 infections in Wuhan, and not just the number of the disease cases.

China has so far not made public any information about the study, which could have potentially been done on hundreds of thousands of Wuhan residents, the first epicentre of the pandemic and a city of around 11 million people.

The Chinese Centre for Disease Control and Prevention (CDC) – which works under the NHC – and the office of respiratory expert, Dr. Zhong Nanshan, who heads the top experts’ team advising the government on fighting the outbreak did not respond to HT’s questions on the survey.

HT’s questions were sent out through the information department of China’s cabinet, the State Council.

Wuhan has so far accounted for over 2500 deaths and more than 50000 infections in China’s tally of 81708 confirmed cases and 3331 deaths.

China has only started to share the number of asymptomatic patients in the country from last week.

The WHO is not part of the survey but is aware that it is being conducted, the WHO’s china representative, Gauden Galea, told HT earlier.

“We know that China is now doing a ‘sero’ survey. This is a survey to look at antibodies in the blood of people in Wuhan,” Galea said.

Galea explained both the survey and its importance.

“I distinguish between infection and disease. So, being infected is the process of getting the infection and it taking hold inside the body. And, then it manifests as the disease Covid-19. But the disease is distinct from the infection but when people are infected, their immune system reacts and develops antibodies,” Galea explained.

Why is it important?

“…there’s a big question in the world how many asymptomatic people are there who got infected but don’t (show symptoms)…you hear very many estimates…but seroprevalence survey would give the answer. It would tell you,” Galea said.

In a recent medical paper on Covid-19 titled “Estimating the ascertainment rate of SARS-CoV-2 infection in Wuhan”, an expert on epidemiological surveillance and intervention, Theodore Lytras, from the Athens-based National Public Health Organisation wrote about the importance of seroprevalence surveys.

“That’s the most important conclusion that should be drawn for our study. We urgently need seroprevalence surveys, which involves testing blood from a population sample to find out whether they have antibodies to the coronavirus, and thus how many of them had been infected,” Lytras told media reporters.

Lytras’ and his colleagues’ modelling suggested that most of the population in Wuhan became infected (probably with little to no symptoms), and although the lockdown obviously helped, the outbreak stopped because there were few uninfected people left for the virus to infect.

“This (seroprevalence survey) will give us definite answers about how many people are actually infected with the coronavirus. Our modelling for Wuhan suggests that nearly every one got infected, but we could be wrong. Only a seroprevalence survey will tell,” Lytras added.

The WHO’s Galea said the results of the survey – when published – will be avidly followed by governments, researchers and planners all around the world.

“This (China) is the first country that has experienced a wave of community transmission, at least in Wuhan. Therefore (the seroprevalence survey) will give you the shape of the infection curve, and not just the disease curve, which is what we have been able to see up to now,” Galea said.



  1. Pingback: Academic programs

  2. Pingback: Bachelor degrees in MIS

  3. Pingback: Econometrics

  4. Pingback: Staff Directory Faculty of economics & political science

  5. Pingback: ????? ??????

  6. Pingback: Computer Science Faculty Members

  7. Pingback: future unversity in egypt news

  8. Pingback: دورات التعليم المستمر لطب الأسنان

  9. Pingback:

  10. Pingback: Distinguished graduate

  11. Pingback: التنمية الشخصية

  12. Pingback: Ovens

  13. Pingback: دكتور اسنان بالقرب مني

  14. Pingback: Healthcare standards

  15. Pingback: التميز الهندسي

  16. Pingback: التعليم الهندسي

  17. Pingback: top university in egypt

  18. Pingback: charity

  19. Pingback: best university in egypt

  20. Pingback: دراسة ادارة الاعمال بجامعة المستقبل

  21. Pingback: Orthodontic Residency Programs

  22. Pingback: Microbiology and Immunology

  23. Pingback: بيان شخصي لجامعة المستقبل

  24. Pingback: Maillot de football

  25. Pingback: Maillot de football

  26. Pingback: Maillot de football

  27. Pingback: Maillot de football

  28. Pingback: Maillot de football

  29. Pingback: Maillot de football

  30. Pingback: Maillot de football

  31. Pingback: Maillot de football

  32. Pingback: Maillot de football

  33. Pingback: SEOSolutionVIP Fiverr

  34. Pingback: pannelli led design

  35. Pingback: pull-ups

  36. Pingback: glucotrust

  37. Pingback: metanail serum pro

  38. Pingback: Fiverr Earn

  39. Pingback: Fiverr Earn

  40. Pingback: Fiverr Earn

  41. Pingback: Fiverr Earn

  42. Pingback: Fiverr Earn

  43. Pingback: Fiverr Earn

  44. Pingback:

  45. Pingback:

  46. Pingback:

  47. Pingback: Advance-Esthetic LLC

  48. Pingback: red boost

  49. Pingback: ikaria juice mediprime

  50. Pingback: blue frenchie houston

  51. Pingback: clothes manufacturing

  52. Pingback: clothes manufacturer

  53. Pingback: puppies french bulldog

  54. Pingback:

  55. Pingback:

  56. Pingback:

  57. Pingback:

  58. Pingback: frenchie san diego

  59. Pingback: blue merle frenchies for sale

  60. Pingback: renting golf cart isla mujeres

  61. Pingback: jute vs sisal rug

  62. Pingback: YouTube SEO

  63. Pingback: Climate-Controlled Piano Storage

  64. Pingback: Grand Piano Transport

  65. Pingback: Piano Freight London

  66. Pingback: Top university in Egypt

  67. Pingback: Top university in Egypt

  68. Pingback: Private universities in Egypt

  69. Pingback: Top university in Egypt

  70. Pingback: isla mujeres golf carts

  71. Pingback: miniature frenchie for sale

  72. Pingback: rescue french bulldog

  73. Pingback: clima los angeles california

  74. Pingback: french bulldog puppy for sale texas

  75. Pingback: Silver stud earrings uk

  76. Pingback: top Samsung phones

  77. Pingback: future university

  78. Pingback: future university

  79. Pingback: future university

  80. Pingback: j’adore cowboys

  81. Pingback: agen multisbo

  82. Pingback: frenchie puppies

  83. Pingback: top university Egypt

  84. Pingback: Professional piano services

  85. Pingback: MB Removals

  86. Pingback: Top business degrees in Egypt

  87. Pingback: Classic Books 500

  88. Pingback: Streamer

  89. Pingback: Porn Australia

  90. Pingback: pupuk organik cair

  91. Pingback: pupuk organik terbaik

  92. Pingback: partners

  93. Pingback: blood sugar control

  94. Pingback: nervolink supplement

  95. Pingback: Medication safety

  96. Pingback: live sex cams

  97. Pingback: live sex cams

  98. Pingback: french bulldogs for sale texas

  99. Pingback: Best University in Yemen

  100. Pingback: Scientific Research

  101. Pingback: Kuliah Termurah

  102. Pingback: FiverrEarn

  103. Pingback: FiverrEarn

  104. Pingback: FiverrEarn

  105. Pingback: FiverrEarn

  106. Pingback: FiverrEarn

  107. Pingback: FiverrEarn

  108. Pingback: FiverrEarn

  109. Pingback: Generator Service Sheffield

  110. Pingback: cheap sex cams

Leave a Reply

Your email address will not be published.

4 × two =

News is information about current events. News is provided through many different media: word of mouth, printing, postal systems, broadcasting, electronic communication, and also on the testimony of observers and witnesses to events. It is also used as a platform to manufacture opinion for the population.

Contact Info

D 601  Riddhi Sidhi CHSL
Unnant Nagar Road 2
Kamaraj Nagar, Goreagaon West
Mumbai 400062 .

Email Id: [email protected]

West Bengal

Eastern Regional Office
Indsamachar Digital Media
Siddha Gibson 1,
Gibson Lane, 1st floor, R. No. 114,
Kolkata – 700069.
West Bengal.

Office Address

251 B-Wing,First Floor,
Orchard Corporate Park, Royal Palms,
Arey Road, Goreagon East,
Mumbai – 400065.

Download Our Mobile App

IndSamachar Android App IndSamachar IOS App
To Top
WhatsApp WhatsApp us