In total, for April, 47% of sites in the Notary still sent the same certificate that they sent before disclosure of the Heartbleed bug. In contrast, for the month of March, 85% of sites still sent the same certificate at the end of the month. This shows that a significant percentage of the sites which are accessed by the Notary user took action because of Heartbleed, especially in the light that a lot of the servers that did not change their certificates might not have been vulnerable.