The leader of the central American country told a local radio station he feels well despite having an underlying health condition. He made the announcement as the country lifted several lockdown measures.
The 64-year-old president, who has multiple sclerosis and uses canes to walk, said he was feeling well.
He plans to address the nation later on Friday.
Local news outlet Prensa Libre tweeted a government statement, saying the president would monitor his health and continue his functions from isolation.
The announcement came on the same day that the country reopened its borders and international flights after a six-month closure due to the coronavirus pandemic.
Foreigners seeking to enter Guatemala will have to present a negative COVID-19 test taken shortly before entry. Guatemalans returning to home and children under 10 will not have to take the test.
Coronavirus: Politicians who've tested positive
French President Emmanuel Macron is the latest top-tier politician to come down with a case of COVID-19. He's the latest among several, perhaps unsurprisingly given politicians' busy schedules and frequent travel.
Image: Olivier Hoslet/REUTERS
Emmanuel Macron
French President Emmanuel Macron tested positive for the virus on December 17. Following the diagnosis, he canceled all of his upcoming trips, including one to Lebanon, and said he would self-isolate for seven days. French Prime Minsiter Jean Castex was also set to isolate after coming into contact with Macron.
Image: Olivier Hoslet/REUTERS
Andrzej Duda
Polish President Andrzej Duda tested positive for coronavirus in October, as the country was facing surge in new infections. Duda, an ally of the ruling nationalist Law and Justice Party, was "feeling fine" at the time of the diagnosis. The day before officials announced his infection, the number of new cases in the country of 38 million hit a daily record of more than 13,600.
Image: Reuters/A. Szmigiel
Donald Trump
Donald Trump, who once said COVID-19 tests were "beautiful," tested positive for the coronavirus, along with his wife Melania, soon after senior aide Hope Hicks also contracted the virus. The infection came less than a month before November's presidential elections in the US.
Image: Doug Mills/abaca/picture alliance
Ambrose Dlamini
Prime Minister of Eswatini Ambrose Dlamini died at the age of 52 after contracting coronavirus. He was the first sitting leader to succumb to the virus.
Image: RODGER BOSCH/AFP
Valery Giscard d'Estaing
Former French President Valery Giscard d'Estaing died aged 94 on December 2 after contracting COVID-19. During his rule, he legalized abortion and brought the country high-speed trains. He also promoted cooperation among European nations, especially in tandem with the former West Germany, forging a strong rapport with Chancellor Helmut Schmidt.
Image: Stephane De Sakutin/AFP/Getty Images
Silvio Berlusconi
The 83-year-old former Italian premier tested positive for the virus and is believed to be asymptomatic, his party announced on September 2. Two of Berlusconi's children as well as his 30-year-old girlfriend are also COVID-19 positive. The ex-premier tested positive after vacationing along Sardinia's coastline, where Italy's rich and famous have been known to flaunt mask policies.
Image: picture-alliance/dpa/D. Vojinovic
Jair Bolsonaro
Brazil's president, who has repeatedly downplayed the severity of the pandemic, contracted the virus in July. He was criticized for ignoring the safety measures recommended by health experts both before and after his diagnosis, including shaking hands and hugging supporters in crowds. His wife and sons also tested positive.
Image: picture-alliance/dpa/E. Peres
Boris Johnson
In late March, British Prime Minister Boris Johnson came down with a coronavirus infection that landed him in the hospital for several days. Johnson spent a week at a hospital in London and three nights in intensive care where he was given oxygen and observed around the clock. He was released in mid-April and credited hospital staff with saving his life.
Image: picture-alliance/AP Photo/S. Dawson
Michel Barnier
Michel Barnier, the EU's chief Brexit negotiator, tested positive for the virus in March. The top Brussels official sent out a tweet in English as well as French saying he was doing well and "in good spirits." He added: "I am following all the necessary instructions, as is my team."
Image: Reuters/Y. Herman
Alexander Lukashenko
Belarus's embattled President Lukashenko told military officials on July 28 that he had survived an "asymptomatic" COVID-19 infection "on his feet," days before his contentious re-election. The claim met skepticism given its timing. He initially dismissed fears about the pandemic as a "psychosis" and went as far as suggesting cures such as drinking vodka, taking saunas and playing ice hockey.
Image: picture-alliance/Russian Look/V. Listsyn
Jeanine Anez
Bolivia's interim president Jeanine Anez announced on July 10 that she had the virus. "I feel well, I feel strong, I am going to keep working remotely from my isolation, and I want to thank all the Bolivians who are working to help us in this health crisis," the leader tweeted at the time.
Image: AFP
Juan Orlando Hernandez
The president of Honduras spent time being treated at a military hospital after falling ill with coronavirus in June. He received specialized care including receiving medicines via an intravenous drip. His wife and two presidential aids also tested positive. Hernandez left hospital in early July after his symptoms improved.
Image: picture-alliance/AP Photo/J. Martin
Alejandro Giammattei
The Guatemalan president told local radio on September 18 that he had tested positive for the virus. The 64-year-old, who has multiple sclerosis and uses canes to walk, said his symptoms were mild. The government said Giammattei plans on monitoring his health and continuing official duties from isolation.
Image: Johan Ordonez/AFP
Abdelmadjid Tebboune
Algerian President Abdelmadjid Tebboune was flown to Germany hospital for treatment after contracting the virus. The 74-year-old looked haggard and spent in his public appearance 47 days after testing positive.
Image: Ryad Kramdi/AFP
Luis Abinader
Luis Abinader, the newly elected president of the Dominican Republic, tested positive during his election campaign. He recovered before the July election and spent one week in isolation.
Image: Getty Images/AFP/O. Barria
Jens Spahn
German Health Minister Jens Spahn, who has led Germany's fight against the pandemic, tested positive for the coronavirus in October and had "cold-like symptoms." He went into immediate isolation and soon recovered. Despite a couple of self-isolation scares for Angela Merkel and other ministers, Spahn remains Germany's highest-profile political case to date.
Image: Daniel Karmann/dpa/picture alliance
Not an exhaustive list
This gallery does not include all major politicians who have contracted the coronavirus. Others, such as Bulgarian Prime Minister Boyko Borissov, Moldovan Prime Minister Ion Chicu, Armenian Prime Minister Nikol Pashinyan, and Croatian Prime Minister Andrej Plenkovic, are just some of the other top politicians who have contracted the virus.
Image: picture-alliance/dpa/B. Pedersen
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Who is Alejandro Giammattei?
Giammattei became Guatemala's 51st president in January this year, taking over from Jimmy Morales who left amid corruption allegations.
Previously, Giammattei had worked as a surgeon and a prison chief.
Before his inauguration, Giammattei met with the Trump administration officials to discuss how to curb illegal immigration and improve border security.
The country went into the pandemic with an already-weak healthcare system — in 2018, there were 3.5 doctors and 0.7 nurses per 10,000 people, according to data from the World Health Organization.
In comparison, Argentina has more than 27 doctors and 25 nurses per 10,000 inhabitants, and France has more than 32 and 114, respectively.
The country's health workers complained of insufficient personal protective equipment (PPE) such as face masks as well as delayed salary payment, non-governmental organization Amnesty International reported in July.
The country has also experienced anti-lockdown demonstrations.
According to latest figures from Johns Hopkins University, the country has over 83,000 total infections — in a country of roughly 17.25 million people. Guatemala has a recorded death toll of 3,036. Per capita, these rates are fairly similar to Germany's, albeit in a country a quarter the size.