It is yet uncertain if vaccinations for COVID-19 can prohibit vaccinated individuals from carrying the novel coronavirus without getting sick and transferring it to others accidentally. It is also important for vaccinated people to use masks with the same routine that a non-vaccinated is following.
Moderna and Pfizer have taken the first mover advantage out of around 200 companies globally that are working on vaccine development and also their vaccines are claimed to be more than 90 percent effective (at least in clinical trials) at protecting people from developing symptomatic COVID-19. For more exciting stuff please subscribe to our Facebook Page.
But one thing that is not yet apparent is whether COVID-19 vaccinations can still keep vaccinated individuals from bringing the novel coronavirus without getting sick and unintentionally spreading it to others. This means that, for the time being, it’s important to keep wearing masks, social distances, and take other precautions even though you’ve been vaccinated.
It would not be so far-fetched to have a vaccine that protects you from developing the worst COVID disease, but you could be infected and you could be spreading it [without] getting really sick,” says Jeffrey Bethony, a professor of microbiology, immunology, and tropical medicine at the George Washington University School of Medicine and Health Sciences who works on vaccines for parasitic diseases and HIV.
The reason this new virus – which is medically labeled SARS-CoV-2 – has spread so rapidly is that people can be contagious several days before they feel ill, and in some cases never develop symptoms. Such an elevated degree of asymptomatic dissemination is ‘not all that common in other infections. For COVID-19, data to date suggest that 80% of infections are mild or asymptomatic, 15% are severe infections.
With flu there is an asymptomatic disease, but not at the level we see with SARS-CoV-2.” This makes it particularly important to understand whether COVID-19 vaccines will prevent asymptomatic infections.
Generally, researchers concur that if you receive a disease-preventing vaccine, you will possibly still prevent diseases, although that is not 100 percent. Any viruses can affect and replicate without being ill in vaccinated persons for relatively short periods. The vaccine protects people against the most serious clinical manifestations of the disease but it doesn’t entirely stop the infection. You still might have a person who is mildly infected, and they’re still able to spread the disease. You still might have a person who is mildly infected, and they’re still able to spread the disease. For more exciting stuff please subscribe to our Facebook Page.
Several developers have reported early data hinting that their COVID-19 vaccines will reduce asymptomatic infections. During late-stage trials for the vaccine developed by the University of Oxford and AstraZeneca, some participants were given weekly COVID-19 tests. One group accidentally was given a low first dose of the vaccine followed by the intended full second dose. Asymptomatic infections were less common in this vaccinated group than they were among those who received a placebo. Researchers are still investigating why that low-dose group fared better than the full-dose group in that regard.
Researchers disinfected patients until they each obtained two doses of the vaccine in Moderna’s clinical trials. The drug manager announced on December 15 that 38 voluntary staff who got the vaccine tested positive for their second dose without displaying COVID-19 symptoms compared with just 14 in their group.
A way to find out how well COVID-19 vaccines prevent transmission is to monitor areas where vaccination is prevalent to see if infections also drop among the remaining unvaccinated people. This type of situation occurred after the first polio vaccine was introduced in 1955; the following year, scientists saw fewer cases even than they were expecting because enough kids had been immunized that the virus had trouble reaching those who hadn’t.
Several vaccine developers, including Moderna and Pfizer, are planning to test the blood of trial participants for antibodies that recognize a part of the virus that wasn’t targeted by the vaccine. Such antibodies would indicate whether a person became infected after being vaccinated.
Until it’s clear it is strongly advised to follow the same routine of protection even after the vaccination as we were following pre-vaccination. Stay safe and protect others. For more exciting stuff please subscribe to our Facebook Page.