Thiruvananthapuram, Sep 8 : Three days after the first Nipah case surfaced at Kozhikode, Kerala, when a 12-year-old boy succumbed to the deadly virus, on Wednesday 20 more samples that were sent for testing at the NIV laboratory, Pune turned negative. State Health Minister Veena George on Wednesday told the media that one cannot completely claim things are fine, but the results give us cheer. "According to the rules of Nipah spread, after the last case is reported, then one waits for 21 days and then for another 21 days, if there are no more fresh cases, then one can say Nipah spread has been contained, so we have to wait more and as such things are fine," said George. The results of the 20 samples which were negative included five from those who had symptoms and 15 were those who had direct contact of the deceased. On Tuesday, 10 samples also reported negative. "Now we are awaiting the results of another 21 more samples, while 68 people are under observation at the Kozhikode Medical College hospital. So at the moment things are under control," said George. State Forest Minister A.K. Saseendran said the department will cooperate with all to see samples are collected from bats and domestic animals from the present location, especially in and around the areas of the victim's house and for that a team of officials from NIV Bhopal is on the way. Meanwhile, the locality of the deceased continues to be cordoned off as a matter of caution. /IANS