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is caused by vs was caused by

Both "is caused by" and "was caused by" are correct, but they are used in different contexts. "Is caused by" is used for present situations or ongoing causes, while "was caused by" is used for past events or causes. The choice between them depends on the tense of the sentence.

Last updated: March 19, 2024 • 2517 views

is caused by

This phrase is correct and commonly used in English to indicate present situations or ongoing causes.

Use "is caused by" when referring to something that is currently causing an effect or situation.

Examples:

The flooding is caused by heavy rainfall.
The illness is caused by a virus.
The traffic jam is caused by an accident.

Show examples from the web [+]

Malaria is caused by Plasmodium parasites.
Cirrhosis is caused by chronic liver disease.
Hypovolemic shock is caused by significant blood loss.
Typically, this problem is caused by port settings.
Plague is caused by Yersinia pestis bacteria.
Your rash is caused by a tick bite.
Underreporting is caused by poor epidemiological surveillance.
This is caused by entry error.
Your anemia is caused by pure red cell aplasia.
Acute PRCA is caused by drugs, most commonly, EPO.
Hepatitis B is caused by a virus that attacks the liver.
Troy's sickness is caused by a performance supplement - stuff called velvetine.
Time of death is caused by many factors...
Headache is caused by muscle tension or vascular stretching.
Our scientists say this is caused by weird particles in his body called Tromations.
GSS is caused by abnormally folded proteins called Prions building up in the brain.
Secondly, You must understand That suffering is caused by craving.
Faulting extends throughout the region and is caused by numerous spatially and temporally varied sources.
Hepatitis C is caused by an RNA virus.
The disease is caused by the defected electrochemical activity of the brain.

Alternatives:

results from
arises from
stems from
derives from
originates from

was caused by

This phrase is correct and commonly used in English to indicate past events or causes.

Use "was caused by" when referring to something that caused an effect or situation in the past.

Examples:

The fire was caused by faulty wiring.
The delay was caused by bad weather.
The damage was caused by a storm.

Show examples from the web [+]

2 days ago ... Looks painful: The red mark was caused by the Graston Technique, a procedure in which microtrauma is induced beneath the skin using metal ...
CHAPTER 2: THE SPANISH INFLUENZA EPIDEMIC OF 1918 WAS CAUSED BY VACCINATIONS. As has been stated before, all medical and non-medical ...
Evidence that Earth's first mass extinction was caused by critters, not catastrophe. by David Salisbury | Sep. 2, 2015, 10:20 AM | Want more research news?
4 days ago ... VW admits emissions scandal was caused by 'whole chain' of failures. German carmaker says company suffered from mindset that tolerated ...

Alternatives:

resulted from
stemmed from
derived from
originated from

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