The USA is one of the worst affected countries of the world with a death toll of approximate 5,50000 and 18.5 million were affected by Covid19. During December 2020, the growth curve of Covid19 was flattened. The initiation of vaccination forced the curve to take a downward spiral. The month of January observed the reverse trend of upward
crescendo of Covid graph. The government changed the vaccination policies and now all adults are eligible for vaccines. The USA approved covid 19 vaccines are, Pfizer-BionTech, Moderna and Johnson & Johnson. All three vaccines cleared the trial successfully and became lethal weapons against the Covid19 virus.
1. Pfizer-BioNTech
The Pfizer-BioNTech Covid19 vaccines available in the USA is the first has unique records against Coronavirus. In trial, the vaccine has a unique record of 100% accuracy. Pfizer Inc. declared an efficacy rate of 91.3 per cent. The vaccine is successful against severe coronavirus and applicable only for 16 years and above. The common side effects of the vaccine are pain, tiredness, headache, chills and fever.Pfizer-BioNTech is the first vaccine authorized by the Food and Drug Administration of the USA for emergency use. A
person needs to take two jobs with a gap of 3 weeks. This is an mRNA kind of vaccine, which enhanced its efficacy rate. Pfizer-BioNTech is not interchangeable with other vaccines. The maximum number of people experienced side effects after the second jab. If a person suffering from allergies, fever, breathing disorder becomes ineligible for the vaccine.
2. Modern
Moderna vaccine is working like manna from heaven for Covid19 affected people, with a 90% efficacy rate. One needs to take two shots with a gap of one month. Moderna vaccine is applicable for adults with age above 18 years. If the person suffering from an allergic reaction after the first dose, the second dose will prove detrimental. The common side effects of the vaccine are pain, redness, swelling accompanied by tiredness, headache, fever, nausea. Moderna is the second vaccine after Pfizer-BioNTech
authorized by FDA for emergency use. The vaccine is produced by Moderna, Inc. Like Pfizer, Moderna is an mRNA vaccine. If a person is not eligible for the Moderna vaccine, should try for some other vaccine. More people experienced side effect after taking a second jab. Moderna Inc. produced 132 million doses and shared them with different countries.
3. Johnson & Johnson
Johnson & Johnson developed a single dose Covid19 vaccine, applicable only for people 18 years and above the age, is authorized by FDA (Food and Drug Administration). The vaccine has an efficacy rate of 85 per cent. The common side effects of vaccine are pain, fatigue, nausea and fever. The vaccine can be stored at normal registration temperature. The major side effect is blood clots, which was seen among recipients of this vaccine. On April 13, CDC and FDA advised a pause over the use of Janssen. Johnson & Johnson introduced the vaccine not for profit-making, but for emergency use to defang the claws of Covid19. Allergic reaction debarred a person to receive the vaccine.
How Pfizer-BioNTech, Moderna and Janseen vaccines work
Both Pfizer-BioNTech and Moderna is mRNA vaccines. The working pattern of both the vaccines same. The mRNA vaccines create an immune system for our body against infectious disease. Protein generated by mRNA vaccines creates an immunity system against intruders.
Johnson & Johnson and AstraZeneca are the quite same type of vaccine. Avdenoviur is a conveyor belt for this vaccine and does not affect human cells. Viral vector implant coronavirous gene in human cells, which produced mRNA which creates spike protein, which helps T cells to curb Covid19 virus and restore memory in B cells, for future fight back.
The US took tangible steps to vaccinate its entire population to dwindle the influence of coronavirus. In vaccination, drive programme US is ahead of other developed countries. During April 2021, 30% of the entire adult population were fully vaccinated and 50% of the adult population received the single jab. In other parts of the world, coronavirus still
prevailed and the fatal virus is spreading its tentacle on the area almost free from the infection of Covid-19. Some parts of the US experienced a new surge of Covid-19, while other states removed the restriction on public gathering. Quite a few states of the US did not perform up to the mark in the vaccination drive programme. Alaska is one of the states, where 37% adult population received just a single jab. Newly elected president Joe Bidden took a vow that all the adult population of the US will be fully vaccinated by the end of May 2021. He appealed to the US citizens to stay vigilant, as the Covid-19 will not be erased within few months.
Above mentioned three USA Covid19 vaccines are recommended by FDA for emergency purpose. There are a couple of other Covid19 vaccines made the USA that are now on trial. A total of 2.26 million Covid19 vaccines administered in the USA. For the first time, the USA state department found chink in the health care system and chalks out a plan to plug up those loopholes to protect the country from any future crisis.Pfizer-BionTech and Moderna vaccine crushed the steady growth of Covid19. According to the new government strategy, all adults are eligible for the Covid19 vaccine. Both the vaccines had done well during the trial, with Pfizer-BioNTech having an efficacy rate of 93.5 per cent. Pfizer-BioNTech and Moderna are successful against severe Covid19 patients. Newly elected president Joe Biden suggested that the vaccination programme will be completed in April 2022. One thing is clear that Covid19 will not be controlled in quick succession. Disciplines, determination and patience will be the cue rule to control the pandemic disease.
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