Chinese vaccine applied in Chile is only 3% effective if a single dose is given

A study by the University of Chile has added an extra dose of concern to the situation the trans-Andean country is going through these days with high daily coronavirus infections and a record of occupancy of beds in intensive units, despite the fact that 45% of the population has already received at least the first injection of the vaccine.

The report concluded that a single application of the coronavirus vaccine, “delivers a protection against contagions of only 3%“. Hence the importance of receiving the second dose and adhering to strict care for at least two weeks after its application.

The study adds that “the vaccine efficacy rises to 56.5% after 14 days of second dose“. These figures, as they clarified, take into account the combined effect of the two injections currently applied in Chile: Sinovac (93% of the second dose administered) and Pfizer BioNTech (7% remaining).

Basically, the study conducted by the researchers Juan Daz, Eduardo Engel and Alejandro Jofr calculated the efficiency of the inoculation process against the Covid-19 which takes place in the neighboring country; and that to date, it has immunized more than 7 million people, of whom 4,042,671 have already received both doses.

Collapse of therapy beds with less than 50 patients: the B side of a successful vaccination in Chile

In short, the study establishes three conclusions sure efficiency vaccines:

• of a 56.5% for those who have been more than two weeks since they received both doses;
• Of a 27.7% for those who also received both doses but still have not passed two weeks since their last application;
• To finish; it’s just a 3% for those who received a single dose.

“The methodology we use, given the information that exists, estimates the combined effect of what has been applied from Sinovac and Pfizer to be 56.5%, and then, taking the effectiveness of Pfizer in Israel, we can deduct a 54% for the Sinovac vaccine, ”explained Engel.

For its part, during the virtual press conference during which the results of this first study were presented, the rector of the University of Chile, Ennio Vivaldi, noted that “Getting vaccinated very significantly reduces the possibility of infection; that does not eliminate it, but it reduces it a lot ”. On which he insisted that “You need to get vaccinated.”