Let it go.
I will always believe the experts who participated in the project and people who monitored their voices from the moon, etc.
from Wikipeda:
The Apollo missions marked the first event where humans traveled through the Van Allen belts, which was one of several radiation hazards known by mission planners.[39] The astronauts had low exposure in the Van Allen belts due to the short period of time spent flying through them.[4][5]
Astronauts’ overall exposure was actually dominated by solar particles once outside Earth’s magnetic field. The total radiation received by the astronauts varied from mission-to-mission but was measured to be between 0.16 and 1.14 rads (1.6 and 11.4 mGy), much less than the standard of 5 rem (50 mSv)[c] per year set by the United States Atomic Energy Commission for people who work with radioactivity.[39]
The third belt was temporary. Have you ever seen a graph of the belt around the earth? The belt was observed around 1958.
Ok, what levels of radiation poisoning did our astronauts endure during their flight through the belts? What were the detrimental effects on them? Monkeys put through Van Allen belt levels of radiation die within 11 months to a few years.