"Before the pandemic I personally never saw a single person denying vaccines to their children. "
In that sense, you were lucky before. In the Western world, widespread anti-vax paranoia dates at least back to the infamous Wakefield paper (1998) linking vaccination to autism. It was probably just a matter of time until it skipped over the ocean to Brazil as well. Language barrier might have protected you temporarily, but with the advent of automatic translation, it has been significantly lowered.
Ironically, there is no vaccine against bad ideas such as anti-vaxxery.
Anti-vax existed in the US long before that. It was common in the hippy alt health movement for decades. Bullshit is a powerful force. So much so that it might be the norm not the exception.
In that sense, you were lucky before. In the Western world, widespread anti-vax paranoia dates at least back to the infamous Wakefield paper (1998) linking vaccination to autism. It was probably just a matter of time until it skipped over the ocean to Brazil as well. Language barrier might have protected you temporarily, but with the advent of automatic translation, it has been significantly lowered.
Ironically, there is no vaccine against bad ideas such as anti-vaxxery.