This study doesn’t just measure the fall-off in effectiveness. It measures effectiveness against the intervening factor, emergence of the more-contagious delta variant. Moderna either had good luck or a superior chemical strategy, but Moderna outperformed the other vaccines hands down.
So when you see studies showing poor vaccine performance, especially in places which didn’t vaccinate with Moderna, the numbers are not, NOT reflective of what is happening in the United States, or in places which started using Moderna.
My family and I read the material from the start and predicted this outcome. We chose Moderna, and are glad we did. We have not contracted COVID-19. All bets are off for the nu omicron variant.
My “fully vaccinated’(Moderna) wife is home sick with Covid and more than “mild” symptoms. She has all the symptoms btw. I, on the other hand, unjabbed and uninfected after exposure. I credit the prophylactic protocol I’m following including Ivermectin.