What Is Herd Immunity For Covid?

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Herd immunityHeard immunity is a topic that is much more relevant now that serveral Covid-19 vaccines have been approved and hundreds of millions have been administered. The novel coronavirus or covid-19 has been the most disruptive cirsis in the world in modern history. It has caused a lot of death, starvation, job losses, family separation, travel bans, school closures, mandatory mask wearing, just to name a few of the effects the pandemic has generated.

The World Health Organization WHO has been posting weekly epidemiological updates, and according to their data, we can say that this pandemic is far from over. From January 3, 2020 to May 6, 2021, there have been 32,210,817 reported confirmed cases of Covid-19 in the United States of America, with 573,722 deaths as of May 6th. While globally speaking, there are already 155,665,214 confirmed cases of covid-19 with 3,250,648 deaths, as of May 6, 2021.


According to data released by the US Centers for Disease Control and Prevention last Friday nearly 111 million people, or 33.4 percent of the US population, are completely vaccinated, and nearly 45 percent of the population, or more than 150 million people, have received at least one dose of the Covid-19 vaccine. With an overall 254,779,333 doses of covid-19 vaccines that have been administered in the United States and about 327,124,625 or 78% total doses have been delivered. 

covid19 vaccineHerd immunity for COVID:

The simpler explanation of herd immunity refers to the fact that a large part of a population is immune to a disease, making the spread of the disease almost impossible. Immunity is obtained by the administration of a vaccine. When someone gets vaccinated, they protect not just themselves but also those around them from infection. The virus will have a tougher time spreading as more people in a population become vaccinated. 

We can be assured that the United States has achieved herd immunity when the majority of our populations are vaccinated, there are no pockets of low immunity, and the virus is no longer circulating, even when we lift measures like face masking and social distancing. However, if other parts of the world haven’t reached herd immunity, variants that evade our immune system can emerge, posing another threat to our country.

President Joe Biden declared on Tuesday that by July 4, 2021, 70 percent of the adult population in the United States would have received at least one dose of the Covid-19 vaccine. According to the IHME, the target will be met by the end of May while according to the modelers, 185 million Americans, or about 88 percent of the adult population, will be vaccinated by September. 

By the end of 2021, it is expected to have at least 60-70% or 220 million people in the US population receiving at least one dose of the vaccine, with children being the last to receive it. 

With more variants being found around the world, such as B.1.617, which has caused a surge in cases in India, officials are rushing to persuade Americans to get vaccinated and help the country achieve herd immunity before vaccine-resistant variants emerge and enter the United States. 

Pfizer/BioNTech stated on Friday morning that it has started the process of getting full approval from the US Food and Drug Administration for its vaccine for people aged 16 and above. This is the first Covid-19 vaccine to be evaluated by the FDA for complete approval in the United States. 

In addition, the United States prepares for the expected emergency use authorization of Pfizer/BioNTech vaccine for use on kids between the ages of 12-15 years old, next week. 

According to the New York Times and CNN, the FDA is expected to approve the Pfizer-BioNTech COVID-19 vaccine for adolescents within the next week. The FDA approval would allow the Pfizer-BioNTech shots to be provided to children aged 12 to 15 years old once the Centers for Disease Control and Prevention signs off. In a recent study, Pfizer-BioNTech demonstrated that the two-dose vaccine was exceptionally safe and effective in 2,260 adolescents aged 12 to 15. In the study, all 16 COVID-19-infected adolescents received the placebo vaccine. 

The covid-19 vaccine in the United States – Statistics and Facts

The United States currently leads the world in overall vaccines administered, with more on the way. The federal government monitors the distribution in the United States. Both the Pfizer and BioNTech vaccines, as well as the Moderna’s shot, require two doses taken in several weeks. J&J’s inoculation only needs one dose.

Covid-19 In Numbers By May 6, 2021

325 million COVID-19 vaccinations distributed In the USA
252 million COVID-19 vaccine doses had been administered In the USA
134 million Pfizer-BioNTech COVID-19 vaccine doses had been administered In the USA
150 million Americans or 58.3% of the population have received the J&J vaccine In the USA
An average of 2.09 million doses per day was administered In the USA
About 26,020,643 people or 82.41% population aged 65 to 74 years old received at least one dose of vaccine In the USA

Covid-19 Vaccinations by Age In The USA

16 – 18
2,147,873 or 2.94% of the population
808,115 or 1.11% of the population
18 – 29
19,349,621 or 36.1% of the population
10,879,889 or 20.3% of the population
30 – 39
19,880,618 or 45.11% of the population
12,442,854 or 28.23% of the population
40 – 49
20,937,447 or 51.59% of the population
13,546,254 or 33.38% of the population
50 – 64
40,638,363 or 64.57% of the population
28,521,732 or 45.32% of the population
65 – 74
26,020,643 or 82.41% of the population
21,186,996 or 67.1% of the population
75 and older
17,999,116 or 80% of the population
14,978,337 or 66.57% of the population
Source WHO

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