This is the 814th most frequent Latvian word.
šāds
Such; this kind of.
Here, 'šādas' is the plural accusative feminine form, referring to multiple unspecified concerns.
Tu jau iepriekš biji izteicis šādas bažas.
You had previously expressed such concerns.
In this usage, 'šādu' describes 'person' in the masculine singular accusative to convey a certain or notable quality.
Viņa nekad nebija sastapusi šādu cilvēku.
She had never met such a person.
The word 'šāds' in this sentence is used demonstratively to specify 'example' as being of a certain kind relevant to the context.