Breakdown of Ta nowa szczepionka jest przeciwko temu wirusowi.
być
to be
ten
this (m)
nowy
new
wirus
the virus
szczepionka
vaccine
przeciwko
against
Questions & Answers about Ta nowa szczepionka jest przeciwko temu wirusowi.
Why does the sentence use temu wirusowi instead of ten wirus?
The preposition przeciwko (against) always requires the Dative case. Because of this, the basic Nominative phrase ten wirus (this virus) must change to its Dative form, temu wirusowi.
Is -owi the standard Dative ending for masculine nouns?
Yes! For almost all masculine nouns like wirus, the Dative singular ending is -owi. There are a few common exceptions that take -u (like panu, ojcu, or psu), but wirusowi follows the regular, predictable rule.
Where does the word temu come from here?
Temu is the Dative masculine and neuter form of the pointing word ten (this). Since wirus is a masculine noun forced into the Dative case by the preposition, ten has to change to temu to agree with it.
Can I use przeciw instead of przeciwko in this sentence?
Absolutely. Przeciw and przeciwko mean exactly the same thing and both require the Dative case. You will hear both, though przeciwko is often preferred in everyday spoken Polish.
What verb is the noun szczepionka (vaccine) related to?
It comes from the verb szczepić (to vaccinate). If you want to say you are getting vaccinated, you would use the perfective reflexive form zaszczepić się.
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