From the beginning of time into eternity, the blood will never lose its Power. Jesus Christ the same yesterday, today, and forever (Hebrews 13:8)). The Blood of Jesus Still Works.
The Blood Will Never Lose Its Power
Yesterday
"And the blood shall be to you for a token upon the houses where ye are: and when I see the blood (not us, not our works), I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt (Exodus 12:13).
In times past the blood applied to the door posts meant that their Faith was in the blood of that lamb. It was a token/symbol of the One (Jesus) Who was to come.
Today
"For God so loved the world, that he gave his only begotten Son, that whosoever believe in him (Jesus) should not perish, but have everlasting life (John 3:16). The blood of sacrificial animals only covered sins. "How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God? (Hebrews 9:14).
Jesus blood shed on the Cross presents Him as the sacrificial Lamb Who fulfilled the Law paying man's sin debt in full once, and for all.
Forever
All who will have Faith in Christ Jesus are covered under His blood and shall be spared; saved from perpetual Judgement; Hell.
The Blood Still Works