Covid: Even With A Double Immunisation, The Virus Can Spread At Home.

People who receive 2 doses of the vaccine can be as contagious as those who are not injected. Even if they have few and no symptoms, the chance of spreading the virus to other unvaccinated roommates is about two in five or 38%.

This drops to one in four or 25% if the roommate is also fully vaccinated. The work of the Lancet Infectious Diseases shows why it's important to vaccinate and protect more people, he said. They warn that unvaccinated people cannot rely on the stabbing of another person to eliminate the risk of infection.

Protection against Covid infection goes down with a double hit

Vaccines did an excellent job at preventing severe illness and death from Covid. Still, they did little at stopping diseases, especially after the emergence of the more contagious Delta variant, which dominates the UK.

And as time goes on, vaccine protection diminishes and needs to be strengthened with additional doses. Graph showing fall protection against infection for Pfizer and AstraZeneca. With households being the most commonly transmitted Covid virus, it makes sense to ensure that every member eligible for the vaccine has had the vaccine and knows the dose, experts say.

According to a survey conducted from September 2020 to September 2021 of 440 households in London and Bolton using the PCR-Covid test:

People with double sutures have a lower but still significant risk of developing Delta compared to people who are not vaccinated. They look just as contagious too Vaccinated people healed the infection faster, but their maximum viral load was similar to that of unvaccinated people when people were most infectious.

This could explain why they can still easily transmit the virus at home

Prof. Ajit Lalvani of Imperial College London, UK, who led the research, said: "The continuous transmission we are seeing among vaccinated individuals makes vaccination important for unvaccinated individuals to prevent severe infection and Covid-19. Especially as more people will be spending time together during the winter months.

"We found that susceptibility to infection increases in the months following the second dose of the vaccine – so those who qualify for the booster vaccine should get it immediately.

Co-author Dr. Annika Singanagamam, also from Imperial, said: "Our results provide essential insights into the effectiveness of vaccination given the new variant and, in particular, why the Delta variant continues to cause high numbers of Covid-19 cases worldwide. Even in countries with high vaccination rates. "Ongoing public health and social measures to limit transmissions – such as wearing masks, social distancing, and testing – therefore remain essential for people who have been vaccinated.