Typically undead monsters in Final Fantasy are weak to Fire spells and take damage from Cure spells. Sometimes they can be destroyed outright with Life spells if the game lets you use them on them. That goes for items with spell-like effects also such as Phoenix Down which can destroy undead monsters in Final Fnatasy VI.
You use the Vaccine item to cure the Virus status.
You can either use the item " echo herbs" or the white magic ability " vox "
In general, the Fire spells work well against most undead monsters, and also the Cure spells deal damage to them too. Depending on the game, resurrection spells can sometimes destroy them outright, for example the Phantom Train in FFVI can be defeated easily by using a Phoenix Down on it. However this doesn't apply to all games or bosses, some won't let you use the Life spell on opponents.
The item soft cures petrify and gradual petrify. I'm pretty sure if you have Garnet's stona it will do the same.
It is dropped in the "Connal Currach" stage in the swamp. You must be on cycle 2 at least for it to drop, but it is still fairly rare.
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There is no English dubbed version of pretty cure: max heart, only an English subbed version :(
Some enemies can Petrify when they hit, I'm guessing you fought a Cockatrice or related creature. You'll need a Gold Needle to cure the character.
Adele
In the King James version the word - cure - appears 5 times the word - cured - appears 4 times the word - cures - appears once
The cure for smallpox is cowpox. Cowpox is a mild version of smallpox and is usually not fatal. The smallpox vaccine contains cowpox.