In recent weeks, the Corona Delta has been at the forefront of the news and has been the subject of much research. This new strain, which first spread in India, has a higher rate of transmission and can affect many people in a short time. In this article, we want to take a look at the symptoms of Delta Covid-19 and see if vaccines have an effect on it.
It was in early 2020 that the corona virus gradually spread to different countries and the world faced a widespread pandemic. It took some time for companies to start producing vaccines, and governments, with long-term quarantines, tried to prevent the spread of this deadly and somewhat unknown disease as much as possible.
At the very beginning and the spread of the main species, scientific authorities began to study the symptoms of this disease and its spread. People who struggled with high fever and cough were classified as suspected of having Covid-19. After a period of loss of sense of smell and taste, they were added to the list of coronary symptoms, and fatigue and sore throat were also considered as possible symptoms.
Over time, the symptoms became more widespread and somewhat more complex, as we encountered new strains of the disease. The world is now dealing with the delta species, and the other major strain identified in China in late 2019 is no longer dominant in the world, although alpha (the species identified in the UK) had replaced it in the world before the delta.
Now that Delta is becoming the dominant strain in the world, it is important to identify its symptoms, and of course you need to be sure of the effectiveness of vaccines on it.
Signs of coronary delta
According to the data collected and of course the information published by the patients, the symptoms of delta strain are different from the primary type and even alpha. Patients are currently experiencing the following symptoms, according to data from the United Kingdom, where the delta is common:
- Sore throat
- runny nose
- Persistent cough
While fever and cough have always been common symptoms of Covid-19, headaches and sore throats have been present in some people, and runny nose was rare in the early species. But now, along with headaches and sore throats, people are experiencing more runny noses, which sometimes confuses the coronary delta with the common cold.
One of the symptoms that is much less common in people with delta is the loss of a low sense of smell for this condition.
There are several possible reasons for this. Initially, the data were mostly related to hospitalized patients who were arguably experiencing more severe symptoms. Patients experience milder symptoms after vaccination of the elderly and, of course, because the delta species affects most young people.
In addition, we are facing a mutation in the virus that can change its characteristics. However, we still can not say exactly why the symptoms in Delta Covid-19 have changed. We still need more research on this species, however preliminary data suggest that the symptoms of this strain are similar to the common cold.
With that in mind, people with coronary heart disease may think they only have a cold and don’t take it too seriously, resulting in more people with the deadly disease. Such a mistake and, of course, a higher prevalence rate increase the importance of vaccination even more.
The effect of the vaccine on the new species of Corona
The current solution to coronary heart disease is widespread vaccination. Although quarantine and measures such as maintaining social distance can prevent further outbreaks, collective immunity must be achieved by injecting the vaccine to return the world to normal.
Now that the delta species is prevalent in different countries and is rapidly spreading to more countries, the important question is whether current vaccines can protect us against this species.
Most experts believe that current vaccines have this ability and can protect us from severe symptoms and prevent us from being hospitalized.
According to Sumia Swaminathan, a senior World Health Organization scientist, real-world research suggests that vaccines protect against severe disease:
“Real-world research into the effectiveness of several vaccines has shown that they provide adequate protection against particularly severe symptoms. “The most important and main priority now is to expand vaccination coverage in all countries.”
Let’s move on to research and analysis. A study published by the British Public Health Service last month examining 14,019 cases of delta found that the Pfizer / BioNTech and Oxford / Astrazenka vaccines prevent up to 96% and 92% of hospitalizations, respectively. Of course, these statistics are related to the injection of two doses of vaccine.
Pfizer has reaffirmed that the vaccine developed by the company works on Delta species, especially after the third dose. Of course, we are still not sure about the third dose and scientists do not know how much we need to inject this dose. Pfizer will begin testing it on the Delta species next month.
More than half of Britain’s population is fully vaccinated, and the delta species is predominant, but the death rate is much lower than in the days when the country was heavily involved with Covid-19. The rate has now reached 0.085 percent, which is 20 times lower than during the peak.
However, we are still not sure about the effectiveness of vaccines. A May study in the United Kingdom found that injecting up to 88% of two doses of the Pfizer vaccine could prevent the onset of the coronary heart disease. But a month later, Scottish researchers reduced that number to 79 percent.
A few days ago, Canadian researchers announced that the Pfizer vaccine is up to 87% effective against Delta Covid-19, which is not much different from 89% of the alpha species. However, some countries have even reported 64% efficiency in research.
The reason for the difference in the efficacy of vaccines in research
There can be several reasons for such a difference. In real assessments, we face many difficulties. For example, during experiments, scientists select participants and people who receive the vaccine or placebo to evaluate the effectiveness of the vaccine.
So far no one was able to send in the perfect solution, which is not strange.
In addition, for some vaccines, there is no real-world test data at all, and scientists have to resort to laboratory tests. In these studies, researchers used the blood of vaccinated people to estimate the vaccine’s effectiveness against the new species.
Laboratory function of vaccines
One of these vaccines is made by Modrena Company. The company says laboratory tests have found that the vaccine produces up to twice as many neutralizing antibodies as the original strain, but the results are still encouraging. According to the company, these results indicate the effectiveness of their vaccine on Delta Corona species.
Johnson & Johnson, another vaccine maker, says its product performs better against the delta species than the beta, which was first identified in South Africa. However, Johnson & Johnson did not provide exact statistics to the public and only referred to sustained care for the species.
The Russian manufacturer of the Corona Sputnik vaccine has also claimed that the vaccine is more effective on the Delta species than any other vaccine, although it has not released any evidence for this claim.
Several Chinese scientists also say that the country’s vaccines are less effective against the Delta Covid-19 strain than previous strains, although few details are available. For example, a Sinwak spokesman said in the past that preliminary results based on blood samples showed a threefold reduction in neutralizing antibodies.
Despite these results, some scientists are wary of the effectiveness of vaccines on this new species. For example, Peter English, a public health expert, points out that although vaccines may be able to prevent hospitalization, we know very little about their effectiveness in spreading the disease.
We will have to wait for the results of more research to see how the new strain of the disease can be dealt with. However, vaccination is still the best solution because even if it can not prevent the spread of this species, it prevents hospitalization and pressure on the treatment system. Therefore, countries need to vaccinate the general population against the corona more quickly.
You can also read the following articles about Delta Corona:
- What is Delta Corona and how can it make the epidemic worse?
- Five facts about Delta Corona that you should know