ここで留意しなければいけないことは、ウイルスが繁殖するスピードが速いという点である。

Sentence Analyzer

ここ 留意しなければいけない こと ウイルス 繁殖する スピード 速い という ある

English Translation

Something else to be borne in mind here is the rapidity with which the virus can reproduce.

Furigana

ここで留意(りゅうい)しなければいけないことは、ウイルスが繁殖(はんしょく)するスピードが(はや)いという(てん)である。

Romanji

Koko de ryūishinakerebaikenai koto wa, uirusu ga hanshokusuru supi-do ga hayai toiu ten de aru.

Words

此処 (ここ)
here (place physically close to the speaker, place pointed by the speaker while explaining); this place; these last (followed by a duration noun and a past sentence: time period before the present time of the speaker); these next ... (followed by a duration noun and a non past sentence: time period after the present time of the speaker); the next ...
(で、にて)
indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.
留意 (りゅうい)
heeding; paying attention; bearing in mind
(こと、こん)
thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
ウイルス (ウイルス、ウィルス、ビールス、バイラス、ヴィールス、ヴァイラス)
virus; viral
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
繁殖 (はんしょく)
breed; multiply; increase; propagation
スピード (スピード)
speed
早い (はやい)
fast; quick; hasty; brisk; early (in the day, etc.); premature; (too) soon; not yet; (too) early; easy; simple; quick
と言う (という、とゆう)
called; named; as many as; as much as; all X; every X
(てん)
spot; mark; point; dot; mark (e.g. in exam); score; points; comma; aspect; matter; respect; counter for goods, items, articles of clothing, works of art, etc.
()
be; is; indicates past or completed action; indicates light imperative
(ある)
a certain ...; some ...

Kanji

Readings: リュウ、 ル、 と.める、 と.まる、 とど.める、 とど.まる、 るうぶる
Meanings: detain, fasten, halt, stop
Reading: 
Meanings: idea, mind, heart, taste, thought, desire, care, liking
Readings: ハン、 しげ.る、 しげ.く
Meanings: luxuriant, thick, overgrown, frequency, complexity, trouble
Readings: ショク、 ふ.える、 ふ.やす
Meanings: augment, increase, multiply, raise
Readings: ソク、 はや.い、 はや-、 はや.める、 すみ.やか
Meanings: quick, fast
Readings: テン、 つ.ける、 つ.く、 た.てる、 さ.す、 とぼ.す、 とも.す、 ぼち
Meanings: spot, point, mark, speck, decimal point