When the Americans already thought they could do without it, the Delta variant arrived to upset the games. And since it is now prevalent practically all over the world and infects with impressive speed and ease, the American CDC (Center for Disease Control and Prevention) backtracks on the decision taken just two months ago: even the fully vaccinated will have to put their masks back on when they are in most closed places. And the reason is that Delta seems to affect the vaccinated as well, although not enough to make them seriously ill or end up in hospital.
Covid, if we let Delta circulate, the virus will understand how to make (also) the vaccinated sick
by Antonio Cassone
The decision was given for imminent by CNN, after the meeting of the health authorities on Saturday night, called to discuss precisely the spread of Delta. “Excellent choice – he commented Celine Gounder, an infectious disease specialist at Bellevue Hospital Center in New York – based on what we’re learning from Delta’s ability to cause infections: it’s a step in the right direction. “
In May, the CDC gave permission for fully vaccinated people to remove their masks indoors and recommended that non-vaccinated people continue to wear it instead. This decision was harshly criticized by many experts, for whom it was premature to remove the mask given the high percentage of unvaccinated people in the country. But the director of the CDC, Rochelle Walensky, he replied citing two significant factors: few vaccinated people became infected with the virus and transmission was also very rare. In addition, the vaccine was shown to be effective against all known variants. To support the thesis the data arrived after a few days from a large study that showed how the Pfizer-BioNTech and Moderna mRNA vaccines were effective in preventing symptomatic disease by 94% in those who had done the two doses and 82% in those who he had only done one.
Covid, Delta reduces the effectiveness of vaccines? No, we are avoiding serious cases
by Noemi Penna
But then the Delta avalanche came, in the United States as in the rest of the world, and everything changed. And since even among those who are fully immunized there are numerous infections, the fear is that the variant may be able to break the vaccine barrier. This has not yet happened but the fear that the virus may be able to make you sick is there. And that is why it was decided to go back to more restrictive measures. A step back that should make us think.
Covid, a study confirms: two doses of vaccine are needed against Delta
by Viola Rita
