is the coved-19 or flu more dangerous .

Wich one

At this time the percent (%) death rate per infected person appears to be higher for COVID-19.   Although because the pandemic is in its early stages, the WHO and CDC will not "officially" confirm this until they accumulate more data on the mortality rate.

In the following - from Johns Hopkins Hospital, one of the premier hospitals in the USA - scroll down to the the section "Deaths"...

https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/coronavirus-disease-2019-vs-the-flu

Note that:

COVID-19 = official name of the illness caused by the Corona Virus

SARS-CoV-2 = the official name of the Corona Virus itself, that causes the illness

Both are fatal, but the death rate of flu is 0.1%

The death rate of COVID-19 is over 3%.

The problem wity COVID-19 is that humans don't have any built up resistance to it. FLU has been around for 500 years or more. Even without vaccine, humanity would have a far less fatalities per capita than COVID-19: about 1/3 of the casulty rate if the flu vaccine didn't exist.

1. You can get a flu shot to improve your resistance, there is no COVID-19 shot or vaccine.
2. The flu causes around 12000-61000 deaths annually according to CDC. https://www.cdc.gov/flu/about/burden/index.html    
3. COVID-19 has caused 30883 number of deaths according to https://www.worldometers.info/coronavirus/
4. COVID-19 virus can stay on contaminated surfaces for at most 9 days according to WHO.https://www.who.int/news-room/q-a-detail/q-a-coronaviruses
5. The flu virus can survive on contaminated surfaces for at most 48 hours (also according to WHO)

Now you can choose which is more dangerous.

To estimate how easily a virus spreads, scientists calculate its "basic reproduction number," or R0 (pronounced R-nought). R0 predicts the number of people who can catch a given bug from a single infected person, Live Science previously reported. Currently, the R0 for SARS-CoV-2, the virus that causes the disease COVID-19, is estimated at about 2.2, meaning a single infected person will infect about 2.2 others, on average. By comparison, the flu has an R0 of 1.3. 

Perhaps, most importantly, while no vaccine exists to prevent COVID-19, the seasonal flu vaccine prevents influenza relatively well, even when its formulation doesn't perfectly match the circulating viral strains. 

So far, it appears the coronavirus is more deadly than the flu. However, there's still a lot of uncertainty around the mortality rate of the virus. The annual flu typically has a mortality rate of around 0.1% in the U.S. So far, there's a 0.05% mortality rate among those who caught the flu virus in the U.S. this year, according to the CDC.

In comparison, recent data suggests that COVID-19 has a mortality rate more than 20 times higher, of around 2.3%, according to a study published Feb. 18 by the China CDC Weekly. The death rate varied by different factors such as location and an individual's age, according to a previous Live Science report. 

you have internet, right?

With a mortality rate of about .1% for the flu versus about 2.5% to 3.0% for COVID-19 depending upon figures available, COVID is 25 to 30 times more deadly. It may also be more contagious than the flu, making it even more deadly.

Stay home, stay safe, stay well . . .