By anyone who can read..
"Viral loads of breakthrough Delta variant infection cases were 251 times higher than those of cases infected with old strains detected between March-April 2020."
They're comparing old strain vs. new strain. They didn't look at vaccinated vs. unvaccinated for either strain.
Um, there were no vaccinations in March-April 2020.
Only some trial groups.
This study looked at the viral load carried by vaccinated medical personnel with “ break through infections” ( leaky vaccines) in 2021, and their viral load average was 250 times higher than unvaccinated cases from a year ago. That is why vaxx people infect not just unvaxx, but other vaxx people.
Superspreaders.
Virus finds a way,