It was a similar situation in Poland which on Monday received 176,000 doses,a drop of around 50 per cent from what was expected,authorities said.
The Czech government was bracing for the disruption to last weeks,slowing its vaccination campaign just as second doses get under way.
"We have to expect that there will be a reduction in the number of open vaccination appointments in the following three weeks,"Health Minister Jan Blatny told reporters,with Pfizer deliveries falling by about 15 per cent this week and as much as 30 per cent for the following two weeks.
Pfizer and its German partner BioNTech have declined to comment on the cuts beyond their statement last week,which announced cuts to deliveries as they ramp up manufacturing in Europe.
Some countries reckon they can handle it. Norway has an emergency stockpile and will continue administering doses as planned,the government's public health body said.
The US drugmaker has told Bulgaria and Poland it will replace missing doses,top officials said.