The correct ventilation rate for CPR depends on the age of the victim and whether an advanced airway is in place. Here are the recommended ventilation rates according to the search results:

• Adults: The correct compression to ventilation ratio for adults is 30:2, which means to provide 30 chest compressions after 2 rescue breaths and maintain a steady rhythm. The ventilation rate for adults should be 10-12 breaths per minute, with each rescue breath given over 1 second with a sufficient tidal volume to produce chest rise.

• Children: The compression-ventilation ratio for 1- and 2-rescuer CPR is 15 compressions to 2 breaths for children. The depth of compression ratio for children is at least one-third of the diameter of the chest, which is about 2 inches or 5cm, with a compression rate of 100-120 per minute. The ventilation rate for a child that isnt breathing is 12 to 20 rescue breaths per minute, which is about one rescue breath every 3 to 5 seconds.

• Infants: For infants with a pulse who are receiving rescue breathing or who are receiving CPR with an advanced airway in place, provide 1 breath every 2 to 3 seconds (20-30 breaths per minute) .

Its important to note that the ventilation rate should be appropriate for each age group and should not cause excessive air to enter the stomach instead of the lungs. By following the correct CPR ratio, blood flow and oxygenation can be maintained until EMS arrives.