Officials said that 151 deaths and 11,650 new positive cases of Covid-19 had been registered, a sharp rise on last week’s daily numbers.
In total, 1,602,163 confirmed cases and 43,018 fatalities have been recorded in Argentina since the beginning of the Covid-19 pandemic.
Buenos Aires Province recorded the highest number of new cases with 4,417, trailed by Santa Fe Province (1,226) and Buenos Aires City (996).
The news emerged as an AFP tally revealed that Latin America and the Caribbean had become the second region after Europe to top half a million deaths from Covid-19.
The milestone came 12 days after Europe passed the half a million mark.
It takes the total worldwide deaths to more than 1.78 million, with the US and Canada accounting for over 350,000 and Asia topping 217,000.
Almost 82 million people worldwide have contracted the virus, including more than 15 million in Latin America — the third largest after Europe (26 million) and the US and Canada (20 million.)
Brazil has the largest number of cases in Latin America with more than 7.5 million.
Latin America was the first region to reach 400,000 fatalities.
On Tuesday, Argentina joined Mexico, Chile and Costa Rica in becoming the fourth country in the region to begin a mass immunisation programme, although it used the controversial Russian Sputnik V vaccine.
The other three countries began vaccinations last week with the jab developed by Pfizer/BioNTech.