“Also a big thanks to my friend and captain Simon and my team-mates in the Danish team for your support, both on 12 June and afterwards.
“Thanks to all the fans who have sent messages to me and my family. It means a lot and has given us strength and support. Thank you.”
Former Tottenham player Eriksen collapsed shortly before half-time over Finland and needed to be treated with a defibrillator as he was resuscitated by medics.
He was fitted with an ICD, implantable cardioverter defibrillator and is now recovering.
Kjaer was commended for his “admirable response” to the situation.
The AC Milan defender, 32, put Eriksen in the recovery position, started the initial CPR procedure before leading the Danish players in forming a ring around Eriksen as he received medical attention and comforted Eriksen’s partner.
“It’s something that will stay with us for the rest of our lives,” said Kjaer.