A third effective weapon was added to the US arsenal against coronovirus on Saturday when the Food and Drug Administration granted the Emergency Use Authority to a vaccine developed by Johnson & Johnson.
The company said it would start shipping millions of doses early this week and deliver 100 million doses to the US by the end of June. With 600 million doses of the country’s first two authorized vaccines prepared by Pfizer-BioNTech and Moderna, due to be delivered within the next four months, that should be enough to vaccinate every American adult.
The new vaccine differs from the two already used in the United States. Here’s how they compare.
One pill for two
The Johnson & Johnson vaccine is administered in a single shot, while Pfizer-BioNotech and Modern vaccines are given in two shots several weeks apart.
The way it works
Johnson & Johnson Vaccine uses a different method to prime the body to fight Kovid-19: A viral vector called Ad26. Viral vectors are common viruses that have been genetically altered so that they do not cause disease but can still cause the immune system to defend itself. Pfizer Bayonet and Modern Vaccines Use messenger RNA to do that.
How well does it work
The Johnson & Johnson vaccine is known to be highly effective at preventing critical illness and death, as are Pfizer-Bayonet and Modern vaccines. It is also very effective in preventing minor illness, although slightly less than both of them. It performs well against the highly contested B.1.351 variant identified for the first time in South Africa At least one other vaccine candidate trouble.
storage and handling
The Johnson & Johnson vaccine is not required to be stored at extremely low temperatures, such as the Pfizer-BioNotech vaccine. It can be safely kept in an ordinary refrigerator for three months, longer than the modern vaccine, which worsens after a month if not kept frozen.
The Johnson & Johnson Vaccine appears to be less prone to Pfizer-BioNTech and Moderna Vaccines which trigger the type of side effects required for monitoring after injection, which may make it more suitable for use at drive-through vaccination sites. . There have been reports that side effects are strongly felt after the second dose, which does not require the Johnson & Johnson vaccine.