And I heard a voice from heaven saying unto me, Write, Blessed are the dead which die in the Lord from henceforth: Yea, saith the Spirit, that they may rest from their labours; and their works do follow them.
After the second coming of Christ, which took place from 66-73AD, anyone can be saved by belief in Jesus. Some believe that only those of the Old Covenant can only be saved or were saved by His first and second comings.
However it wasn't till the second coming that the New Heavens and New Earth, the full employment of the New Covenant was in full effect. Meaning from that point forward all can be saved by Christ. Anyone who so chooses to believe and follow His commands can be saved! Romans 11