Twitter users are not thrilled with the new brand names given to several of the COVID-19 vaccines. 

On Thursday, Health Canada announced the official name changes for Pfizer, Moderna and AstraZeneca’s COVID-19 vaccines in the country in a series of tweets. 

The public health government institution revealed that moving forward, Pfizer’s vaccine will be called Comirnaty, Moderna’s as Spikevax and AstraZeneca’s as Vaxzevria. The announcement follows Canada’s decision to grant full approval for children under the age of 12 to receive the Pfizer and Moderna vaccines. 

The new names garnered mixed reactions on Twitter, where people poked fun at the names and criticized them for being challenging to remember.

This story first appeared on Campaign US.