CLEVELAND, Ohio – The coronavirus grew from a few cases in Wuhan, China, to a pandemic with cases in Ohio in what seems like less than three months.

The first reports of cases of what would become COVID-19 came on Dec. 31, 2019. Since then, more than 120,000 cases have been confirmed worldwide, with more than 4,300 deaths, according to Johns Hopkins University.

With new developments across the globe every day, it can be difficult to keep track of exactly what’s happening.

Here’s how the illness spread. For updates and information, check cleveland.com/coronavirus.

Dec. 31, 2019 – China reported a cluster of pneumonia cases associated with the Huanan Seafood Wholesale Market in Wuhan, Hubei Province.

Jan. 1, 2020 – Huanan Market is closed for environmental sanitation and disinfection. World Health Organization asks for information to assess risk.

Jan. 3 – Case numbers grow to 44 in China, with 11 severely ill.

Jan. 7 – Chinese officials confirm illness is a new form of coronavirus. CDC establishes a COVID-19 Incident Management System.

Jan. 8 – U.S. Centers for Disease Control and Prevention advises clinicians to watch for patients with respiratory symptoms and a history of travel to Wuhan, China.

Jan. 11 – China confirms first death from coronavirus.

Jan. 13 – Thailand reports first confirmed case of coronavirus.

Jan. 15 – Japan reports first confirmed case.

Jan. 20 – Korea and United States confirm first case of coronavirus. In the U.S., the first patient is a 35-year-old man in Seattle.

Jan. 21 – CDC opens COVID-19 Emergency Operations Center.

Jan. 22 – CDC receives first clinical specimen of coronavirus, which health officials then culture to study.

Jan. 23 – Chinese officials close off Wuhan, the center of the coronavirus epidemic.

Jan. 28 – Miami University reports two students who had recently traveled to China were in self-quarantine because they are suspected to have coronavirus. The Ohio Department of Public Health holds a news conference and conducts tests.

Students at Miami University wear masks, as the school holds a news conference about two possible cases among students.

Jan. 30 – CDC confirms first person-to-person spread of coronavirus between a couple in Illinois. One of them had visited Cleveland recently.

The World Health Organization declares a “public health emergency of international concern.” CDC publishes guidance for healthcare professionals on the clinical care of COVID-19 patients.

Jan. 31 – U.S. declares a public health emergency and establishes restrictive mandatory quarantine guidelines for travelers arriving at major airports.

Feb. 2 – CDC generates enough of the coronavirus specimen to distribute externally.

The Miami University students test negative for coronavirus. And the first coronavirus death occurs outside of China in the Philippines.

Feb. 10 – Death toll in China passes SARS worldwide total.

Feb. 11 - WHO names new coronavirus COVID-19, intentionally avoiding including a place name to prevent inaccuracy or stigma.

🚨 BREAKING 🚨



"We now have a name for the #2019nCoV disease:



COVID-19.



I’ll spell it: C-O-V-I-D hyphen one nine – COVID-19"



-@DrTedros #COVID19 pic.twitter.com/Kh0wx2qfzk — World Health Organization (WHO) (@WHO) February 11, 2020

Feb. 14 – First death in Europe reported in Paris, France.

Feb. 23 – Italy suffers surge in cases in Northern Italy. In response, the government begins quarantining cities.

Feb. 25 – CDC said that it’s inevitable the disease will spread to the U.S and residents should prepare for “severe disruptions.”

Feb. 28 – The first case of American coronavirus community spread is found in California.

Feb. 29 – Washington governor declares state of emergency. Travel is banned to specific areas of Italy and South Korea, and all of Iran.

March 1 – First U.S. death is reported in Washington state.

March 3 – Ohio Governor Mike DeWine announces that spectators will not be allowed at most of the Arnold Classic, a massive sports festival in Columbus. Officials announce Ohio is getting testing kits.

March 4 – Recruitment begins for coronavirus vaccine trials in Seattle.

March 5 – Ohio receives its first coronavirus testing kit. The kits take several days to calibrate.

This undated photo provided by U.S. Centers for Disease Control and Prevention shows CDC’s laboratory test kit for the new coronavirus.CDC via AP

March 6 – South by Southwest in Austin, Texas is canceled to prevent coronavirus spread. No cases were confirmed in Austin at the time.

March 8 – CDC recommends avoiding cruise travel and for older passengers to avoid large gatherings and long plane rides.

CDC announces about 78 state and local public health labs in 50 states and the District of Columbia have successfully verified and are currently using COVID-19 diagnostic test.

March 9 – Ohio confirms first cases of coronavirus in Cuyahoga County; Gov. Mike DeWine calls state of emergency.

March 10 – DeWine issues recommendations on coronavirus spread. Widespread cancellations occur and colleges begin shuttering due to coronavirus.

March 11 – The WHO declares coronavirus a pandemic. Ohio confirms its fourth case of coronavirus. St. Patrick’s Day parade and Cleveland International Film Festival are canceled.

President Donald Trump announces further restrictions including temporarily barring travel from Europe.