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Single Vaccine Dose Cuts COVID-19 Transmission By Half: UK Study

According to Public Health England, those given a first dose of either vccine and who became infected with SARS-CoV-2 three weeks later were between 38 and 49 per cent less likely to pass the virus on than unvaccinated people

Single Vaccine Dose Cuts COVID-19 Transmission By Half: UK Study
Highlights
  • The study included more than 57,000 contacts from 24,000 households
  • Most of the people in the study were under the age of 60
  • Vaccines are vital in helping us return to a normal way of life: Expert

London: A single dose of either the Oxford/AstraZeneca or Pfizer/BioNTech vaccines have been found to cut COVID-19 transmission rates by up to half, according to a new Public Health England (PHE) study on Wednesday. Those given a first dose of either of the two vaccines currently being administered by the National Health Service (NHS) and who became infected with SARS-Cov-2 – the coronavirus which causes COVID-19 – three weeks later were between 38 and 49 per cent less likely to pass the virus on than unvaccinated people.

Also Read: ‘Indian Strain’ Of Coronavirus Found In 17 Countries: WHO

The PHE also found that protection against COVID-19 was seen from about 14 days after vaccination, with similar levels of protection regardless of age of cases or contacts.

A new study shows one dose of the vaccine can cut the risk of household transmission by up to 50 per cent. This is further evidence that the vaccine protects you and those around you. When you get the call, get the jab, said UK Health Secretary Matt Hancock.

The study, which is yet to be fully peer-reviewed, included more than 57,000 contacts from 24,000 households in which there was a lab-confirmed coronavirus case that had received a vaccination, compared with nearly 1 million contacts of unvaccinated cases. Contacts were defined as secondary cases of coronavirus if they tested positive two to 14 days after the initial household case.

Most of the people in the study were under the age of 60. The protection against transmission was found on top of the reduced risk of a vaccinated person developing symptomatic infection in the first place, which has previously been found to be around 60 to 65 per cent – four weeks after one dose of either vaccine.

Also Read: WHO Bolsters Support To India To Tackle Second COVID-19 Wave

Vaccines are vital in helping us return to a normal way of life. Not only do vaccines reduce the severity of illness and prevent hundreds of deaths every day, we now see they also have an additional impact on reducing the chance of passing COVID-19 on to others, said Dr Mary Ramsay, head of immunisation at PHE.

While the findings are seen as “encouraging”, the PHE is calling on people to continue with safety measures against transmission such as “practise good hand hygiene and follow social distancing guidance”. Another study has shown that one in four people have mild, short-lived side effects after receiving the Pfizer or AstraZeneca vaccines. The most common side effects were headache, fatigue and tenderness, most peaking within 24 hours after vaccination and usually lasting one to two days.

The study, which is published in the ‘Lancet Infectious Diseases’ and is based on analysis by researchers at King’s College London with data from the Zoe COVID Symptom Study app, tracks 627,383 users of the app who reported effects within eight days of receiving one or two doses of either vaccines between December 8, 2020, and March 10 this year.

The data should reassure many people that, in the real world, after-effects of the vaccine are usually mild and short-lived, especially in the over-50s, who are most at risk of the infection, said Tim Spector, professor of genetic epidemiology at King’s College London and lead scientist on the symptom study app.

Also Read: COVID-19 Vaccine FAQs: Should Women Avoid COVID Vaccine During Periods? How To Use A Pulse Oximeter?

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. In wake of the current COVID-19 pandemic, the need for WASH (WaterSanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. Only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and become a Swasth or healthy India. The campaign will continue to cover issues like air pollutionwaste managementplastic banmanual scavenging and sanitation workers and menstrual hygiene

World

24,06,78,961Cases
20,23,40,977Active
3,34,39,331Recovered
48,98,653Deaths
Coronavirus has spread to 195 countries. The total confirmed cases worldwide are 24,06,78,961 and 48,98,653 have died; 20,23,40,977 are active cases and 3,34,39,331 have recovered as on October 18, 2021 at 4:17 am.

India

3,40,81,315 13,596Cases
1,89,6946,152Active
3,34,39,331 19,582Recovered
4,52,290 166Deaths
In India, there are 3,40,81,315 confirmed cases including 4,52,290 deaths. The number of active cases is 1,89,694 and 3,34,39,331 have recovered as on October 18, 2021 at 2:30 am.

State Details

State Cases Active Recovered Deaths
Maharashtra

65,91,697 1,715

32,230 994

64,19,678 2,680

1,39,789 29

Kerala

48,54,321 7,555

88,186 3,292

47,39,270 10,773

26,865 74

Karnataka

29,83,459 326

9,479 58

29,36,039 380

37,941 4

Tamil Nadu

26,87,092 1,218

14,814 208

26,36,379 1,411

35,899 15

Andhra Pradesh

20,60,472 432

6,034 159

20,40,131 586

14,307 5

Uttar Pradesh

17,10,028 9

119 10

16,87,011 19

22,898

West Bengal

15,80,530 624

7,421 24

15,54,132 634

18,977 14

Delhi

14,39,390 32

320 6

14,13,981 38

25,089

Odisha

10,35,077 443

4,542 68

10,22,250 508

8,285 3

Chhattisgarh

10,05,654 16

183 2

9,91,901 14

13,570

Rajasthan

9,54,390 2

42 2

9,45,394 4

8,954

Gujarat

8,26,290 10

207 6

8,15,997 16

10,086

Madhya Pradesh

7,92,684 5

84 12

7,82,077 17

10,523

Haryana

7,71,076 15

123 9

7,60,904 6

10,049

Bihar

7,26,026 5

48 4

7,16,317 1

9,661

Telangana

6,68,955 122

3,924 55

6,61,093 176

3,938 1

Assam

6,06,468 205

3,436 46

5,97,082 245

5,950 6

Punjab

6,02,035 27

227 8

5,85,264 16

16,544 3

Jharkhand

3,48,430 7

122 1

3,43,173 8

5,135

Uttarakhand

3,43,756 9

178 1

3,36,181 8

7,397

Jammu And Kashmir

3,31,062 95

843 12

3,25,793 107

4,426

Himachal Pradesh

2,21,437 131

1,303 5

2,16,414 125

3,720 1

Goa

1,77,522 60

604 6

1,73,572 62

3,346 4

Puducherry

1,27,396 52

585 13

1,24,961 64

1,850 1

Manipur

1,22,737 104

1,422 0

1,19,418 102

1,897 2

Mizoram

1,12,848 249

11,633 1,143

1,00,829 1,389

386 3

Tripura

84,321 16

104 4

83,401 12

816

Meghalaya

82,953 55

845 32

80,673 86

1,435 1

Chandigarh

65,302 3

25 3

64,457 6

820

Arunachal Pradesh

54,987 7

140 30

54,567 37

280

Sikkim

31,749 4

174 8

31,184 12

391

Nagaland

31,611 40

248 12

30,689 28

674

Ladakh

20,878 2

36 10

20,634 12

208

Dadra And Nagar Haveli

10,676 1

4 1

10,668

4

Lakshadweep

10,365

0 0

10,314

51

Andaman And Nicobar Islands

7,641

9 0

7,503

129

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