This is a misrepresentation. There are radiation doses with negligible risk. No radiation genetic effects have ever been demonstrated in human populations. Latent period-Radiation induced cancers occur after a latent period has elapsed. The fetus and children are 5-10 times more sensitive to radiation induced cancers than an adult.
Teratogenic effects are also possible at very high doses.
The magnitude of your radiation risk is dependent on your total radiation dose. These badges are capable of measuring 0.01 rem per month. The annual dose limit for normal adults is 5 rem per year. Clearly, your radiation dose is expected to be very low. The State of Michigan requires this training of electron microscopists and stringently reviews the training records.